Online books (including books found on personal websites, databases, or even in audio form)
Begin the entry in the reference list like the entry for a comparable printed work, but use the URL (or a DOI [digital object identifier] if it is available) in place of the publisher information. Provide them at the end of the reference. "If you must break a DOI or a URL at the end of a line, break it after a double slash or before any other mark of punctuation; do not add a hyphen. Do not put a period at the end of the entry."
Use a retrieval date for an online source only if the content is likely to change.
Include the type and version of e-book you are referencing (e.g., "[Kindle DX version]").
Format for citing a whole book: use (n.d.) for source without a date
Author, A. (year of publication). Title of book. Retrieved from http://xxxxxxxxx
Author, A. (year of publication). Title of book. https://doi.org/xxxxxxxxxxxx
In E-reader version do not include the E-reader version in the citation.
Author, A. (year of publication). Title of book. Retrieved from http://xxxxxxxxx
Citation examples:
Stoker, B.(1897). Dracula. Retrieved from http://www.gutenberg.org/files/345/345-h/345-h.htm
Same ebook in Kindle version
Stoker, B. (1897). Dracula Retrieved from http://www.gutenberg.org
Format for citing a chapter in an ebook:
Author, A. A., & Author, B. B. (year of publication). Title of chapter. In Title of book or larger document. Retrieved from http://xxxxxxxxx
Author, A. A., & Author, B. B. (year of publication). Title of chapter. In Title of book or larger document. doi:xxxxxxxxxx
Format for citing a chapter in an ebook with editor(s)
Author, A. (year of publication). Title of chapter. In E. Editor (Ed.), Title of book (pp. xx–xx). Retrieved from http://xxxxxxxxx
Author, A. (year of publication). Title of chapter. In E. Editor (Ed.), Title of book (pp. xx–xx). doi:xxxxxxxxxx
Format: with author and date:
Author, A. A., & Author, A. A. (Year Published) Article title. In Encyclopedia Name. Retrieved from http://xxxxxxxxxx
If the encyclopedia or dictionary are updated by the publisher and are not archived, include the retrieval date in the reference:
Duignan, B. (n.d.) What’s the Difference Between a Psychopath and a Sociopath? And How Do Both Differ from Narcissists? In Encyclopedia Britannica. Retrieved November 7, 2019, from https://www.britannica.com/story/whats-the-difference-between-a-psychopath-and-a-sociopath-and-how-do-both-differ-from-narcissists
Encyclopedias and dictionaries do not provide authors' names. When there is no author, move the entry name to the front of the citation. Provide publication dates if present or specify (n.d.) if no date is present in the entry.
Format: without author and date
Entry title. (n.d.) In Title of Encyclopedia or dictionary. Retrieved from http://xxxxxxxxxx