@misc{ enwiki:1166371666, author = "{Wikipedia contributors}", title = "Isturitz and Oxocelhaya caves --- {Wikipedia}{,} The Free Encyclopedia", year = "2023", url = "https://en.wikipedia.org/w/index.php?title=Isturitz_and_Oxocelhaya_caves&oldid=1166371666", note = "[Online; accessed 7-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:1166371666, author = "{Wikipedia contributors}", title = "Isturitz and Oxocelhaya caves --- {Wikipedia}{,} The Free Encyclopedia", year = "2023", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Isturitz_and_Oxocelhaya_caves&oldid=1166371666}", note = "[Online; accessed 7-July-2024]" }