@misc{ enwiki:1217049420, author = "{Wikipedia contributors}", title = "Gjálp and Greip --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Gj%C3%A1lp_and_Greip&oldid=1217049420", note = "[Online; accessed 8-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:1217049420, author = "{Wikipedia contributors}", title = "Gjálp and Greip --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Gj%C3%A1lp_and_Greip&oldid=1217049420}", note = "[Online; accessed 8-July-2024]" }