@misc{ enwiki:1195265927, author = "{Wikipedia contributors}", title = "1938 City of London by-election --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=1938_City_of_London_by-election&oldid=1195265927", 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:1195265927, author = "{Wikipedia contributors}", title = "1938 City of London by-election --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=1938_City_of_London_by-election&oldid=1195265927}", note = "[Online; accessed 7-July-2024]" }