In order of preference, MLA recommends the use of a DOI, then a permalink, and lastly the URL.
DOIs should include: https://doi.org/ in front of the DOI.
Permalinks are more stable URLs, often provided in the SPC databases.
URLs should not include the protocol http:// or https://.
Long URLs, generally more than three lines, should be truncated. See the MLA style website for further details:
style.mla.org/urls-some-practical-advice/.
Author's Last Name, First Name. “Chapter Title.” Book Title, edited by
First Name Last Name, Publisher, Publication Date, Page(s).
Database, DOI or permalink or URL.
Author's Last Name, First Name. Book Title. Publisher, Publication
Date. Database, DOI or permalink or URL.
Putt, Carole A. “Outcome Research in Substance Abuse Treatment.”
Substance Abuse: A Practitioner’s Guide to Comparative
Treatments, edited by E. Thomas Dowd and Loreen Rugle,
Springer, 2007, pp. 8-49. eBrary, site.ebrary.com.db20.
linccweb.org/lib/phcc/detail.action?docID=10176163.
Wray, David. Catullus and the Poetics of Roman Manhood. Cambridge
UP, 2001. eBook Collection (EBSCOhost),
site.ebrary.com.db20.linccweb.org/lib
/phcc/detail.action?docID=10014606.
According to Putt, "A direct quote from the electronic book" (10). In addition, Wray states, "Another direct quote from this book; however, only include the page number if the electronic article has the publication page numbers."
or
A paraphrased sentence will have the author's name and the page number, if available, at the end (Putt 10).