@misc{ enwiki:1221743604, author = "{Wikipedia contributors}", title = "List of Billboard Hot 100 number ones of 1981 --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=List_of_Billboard_Hot_100_number_ones_of_1981&oldid=1221743604", note = "[Online; accessed 9-July-2024]" }
url
(\usepackage{url}
somewhere in the preamble), which tends to give much more nicely formatted web addresses, the following may be preferred:
@misc{ enwiki:1221743604, author = "{Wikipedia contributors}", title = "List of Billboard Hot 100 number ones of 1981 --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=List_of_Billboard_Hot_100_number_ones_of_1981&oldid=1221743604}", note = "[Online; accessed 9-July-2024]" }