In the 7th edition of APA, cite both print and electronic books (available through academic databases) the same way.
"Does the book have a DOI? Include a DOI if available. Do not include a URL or database information for works from academic research databases. Include a URL for ebooks from other websites. Do not put a period after the DOI or URL"
Basic Template:
Author, A. A. (Year). Title of book. Publisher. https://doi.org/XXXXXX
Book/ E Book
Example:
Reid, S. (2002). Book bridges for ESL students: Using young adult and children's literature to teach ESL.
Scarecrow Press.
Book with DOI
Example:
Elliott, R., Watson, J. C., Goldman, R. N., & Greenberg, L. S. (2004). Learning emotion-focused therapy: The process-
experiential approach to change. American Psychological Association. https://doi.org/10.1037/10725-000
Book with URL
Example:
Austin, M.H. (1903). The land of little rain. Houghton Mifflin Company. http://www.gutenberg.org/etext/365
Template
Editor, A. A. (Ed.). (Year). Title of Book. Publisher.
Example:
Merriam, S. (Ed.). (2001). The new update on adult learning theory. Jossey-Bass.
Multiple Editors
Example:
Akers, R., & Jensen, G. (Eds.). (2002). Social learning theory and the explanation of crime : A guide for the new century.
Transaction.
Template
Author, A. A. (Date). Title of book (xth ed.). Publisher.
Example:
Torp, L., & Sage, S. (2002). Problems as possibilities problem-based learning for K-12 education, (2nd ed.).
ASCD.
Template
Author of Chapter, A. A. & Author, B. B. (Year). Title of chapter or entry. In A. Editor, B. Editor, & C. Editor (Eds.), Title of book (pp. xxx–xxx). Publisher.
Example:
Shephered, S. (1988). Shakespeare's private drawer: Shakespeare and homosexuality. In G. Holderness
(Ed.), The Shakespeare myth (pp. 96–110). Manchester University Press.
See 
What's New?
Whole Anthology
Template
Editor, A. A. (Ed.). (Year). Title of book. Publisher.
Example:
Greene, D. & Lattis, R. (Eds.). (1975). The complete Minnesota tragedies. Main Street Press.
Work in an Anthology
Template
Author, A. A. (Year). Title of work. In A. A. Editor (Ed.), Title of book (pp. XX–XX). Publisher. (Original work published Year)
Example:
Ibsen, Henrik. (2002). A doll's house. In R. S. Gwynn (Ed.), Drama: A pocket anthology (2nd ed., pp. 209
277). Longman. (Original work published 1879)
Always look carefully for a byline/author; this is usually at either the beginning or the end of an entry.
With Entry Author
Template
Author, A. A. (Year). Title of entry. In A. Editor (Ed.), Title of reference work (xth ed., Vol. xx, pp. xxx–xxx). Publisher.
Example:
Hodges, W. (2006). First-order logic. In D. M. Borchert (Ed.), The encyclopedia of philosophy
(2nd ed., Vol. 3, pp. 639–659). Thomson Gale.
No Entry Author
Template
Title of entry. (Year). In A. Editor (Ed.), Title of reference work (xth ed., Vol. xx, pp. xxx–xxx). Publisher.
Example:
Southeast Asia. (2003). In The new encyclopaedia Britannica: Macropedia (15th ed., Vol. 27, pp. 711–794).
Encyclopaedia Britannica.
Entries in Online Encyclopedia
Note: If the author is the same as the website, omit the website component. If an encyclopedia is continuously updated and does not have an archived version, include the retrieval date.
Author, A. A. (Year). Title of entry. In A. Editor (Ed.), Title of reference work (xx ed.). Website. http://xxxxx
Masolo, D. (2006). African sage philosophy. In E. N. Zalta (Ed.), The Stanford encyclopedia of philosophy (Fall 2008 ed.).
Stanford University. http://plato.stanford.edu/entries/african-sage/
United States Holocaust Memorial Museum. (n.d.) Antisemitism. In Holocaust encyclopedia. Retrieved October 7, 2019, from
https://encyclopedia.ushmm.org/content/en/article/antisemitism
Template
Author, A. A. (Year). Foreign title [Translated title]. Publisher.
Example:
Paz, O. (1959). El laberinto de la soledad [The labyrinth of solitude]. Fondo de Cultura Económica.