Cite the author, date of publication, title and assigned digital object identifier (DOI) of the book: Smrt, F. B. (1967). On the trail of the mythic weasel-beast. doi: 10.1037/0735-7136.133.3.192
Cite the author, date of publication, title and site from which an electronically published book was retrieved: Keinkopf, S. L. (1973). How to drive fast and not get caught. Retrieved from http://www.slypilcrowe.com
Cite the author, date of publication and title. Use the word "Author" if the author is the publisher: Baby, R. Q. (1981). Refrigerator hermeneutics. Author.
Cite the author, date of publication, title, digital version and site from which an electronic version of a print book was retrieved: Filbert, B. B. (2003). Ars longa, vita kind of short [IZ Reader version]. Retrieved from http://www.illywilly.co.uk/html/brown.asp
Cite the author, date of publication, retrieval site and date of original publication for an electronic version of a republished book: Venial, Q. V. (2007). Morality in the dark ages. Retrieved from http://www.booksworthrereading.com/show.asp?itemID=01 (Original work published 1901)