Include as much of the information as possible.
The MLA Handbook 8th edition recognizes that internet material may have multiple dates of publication. Use the date "most meaningful for your readers (pp. 42-3).
Author. "Title of document." Name of the Website. Publisher or
sponsor of the website, Publication date.
Note. Most reputable and authoritative websites will include an author who is proud of their work, a title for each page, a proud sponsoring website, and a date it was published (or even better, last updated).
General (pp. 40-4):
Fontane, Walter M. "Citation Style Guides: MLA, Websites."
Frazar Memorial Library Libguides. McNeese State
University, Sept. 2017. http://libguides.mcneese.edu/
"Iranian Women Stand Up in Defiance, Flout Rules."
CNN.com. Cable News Network, 23 June 2009.
Essay in Library Database (pp. 42-5):
"Barnes & Noble, Inc. SWOT Analysis." Barnes & Noble
SWOT Analysis, 8 June 2017, pp. 1-8. EBSCOhost,
"Michael Jordan." Notable Black American Men, Book II,
edited by Jessie Carney Smith, Gale, 1998.
Biography in Context, link.galegroup.com/apps/doc/
E-book (pp. 31, 34):
Critchley, David. Origin of Organized Crime in America:
The New York City Mafia, 1891-1931. Routledge, 2009.
Gikandi, Simon. Ngugi wa Thiong'o. Cambridge UP, 2000.
ACLS Humanities E-book, hdl.handle.net/2027/heb.