MLA is the type of format used in research works to give credit to the sources and resources used or referred. It is also used to avoid the possibility of plagiarism in the work.
MLA has a format of citing the resources. This includes:
Author's name
Title of the work
Publication date
Version
Publisher
Date of Access
Date of access is the date on which the web page is accessed by the author. It is used in the conditions when you are citing a website.
So, the missing citation in the question is 'date of access'.
