Cite the archived version of the page, so that readers can retrieve the version you have used.
To access the archived version, go to Wikipedia page and click on “view history" and then the time and date of the version you have used.
If there is no permanent link to the archived version then “…include the URL for the entry and the retrieval date” statement (American Psychological Association, 2020, p. 329).
In-text citation
(Title, Year)
(“List of Prime Ministers in Australia”, 2020).
Title (Year)
“List of Prime Ministers in Australia” (2020).
Reference list
Title. (Year, Month Day). In Wikipedia. https://xxxxx
List of Prime Ministers in Australia. (2020, May 7). In Wikipedia. https://en.wikipedia.org/w/index.php?title=List_of_prime_ministers_of_Australia&oldid=955317137