"Google and Wikipedia are reasonable places to begin your research but not good places to end it. Follow up on the sources that Wikipedia entries cite."
(MLA Handbook 12).
"A title is placed in quotation marks if the source is part of a larger work. A title is italicized . . . if the source is self-contained and independent."
(MLA Handbook 25-26).
Example:
"Fish Migration." Wikipedia: The Free Encyclopedia, Wikimedia Foundation, 15 April 2020, en.wikipedia.org/wiki/Fish_migration.