@misc{ enwiki:1229263313, author = "{Wikipedia contributors}", title = "List of M*A*S*H characters --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=List_of_M*A*S*H_characters&oldid=1229263313", note = "[Online; accessed 3-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:1229263313, author = "{Wikipedia contributors}", title = "List of M*A*S*H characters --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=List_of_M*A*S*H_characters&oldid=1229263313}", note = "[Online; accessed 3-July-2024]" }