@misc{ enwiki:1228559822, author = "{Wikipedia contributors}", title = "Electoral results for the district of Swansea --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Electoral_results_for_the_district_of_Swansea&oldid=1228559822", note = "[Online; accessed 6-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:1228559822, author = "{Wikipedia contributors}", title = "Electoral results for the district of Swansea --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Electoral_results_for_the_district_of_Swansea&oldid=1228559822}", note = "[Online; accessed 6-July-2024]" }