Q. How do I cite an eBook?

APA: 

In general, ebooks are cited like other publications with Author, Date, Title, Form [eg. Kindle, epub, in square brackets], and where the book was downloaded from, eg. Amazon.com, rather than publication data. 

Example:

Brown, John. (1856). My Life in Kansas. [Kindle]. Retrieved from http://Amazon.com.

For in-text citations cite (Author, date).

MLA: 

In general, ebooks are cited like other publications with Author, Title, Publication info (city, publisher, date), and type of electronic file e.g. Kindle file.

Example:

Brown, John. My Life in Kansas. Boston: Abolitionist Books, 1856. Kindle file.

For in-text citations cite (Author page #).