@misc{ enwiki:1221629383, author = "{Wikipedia contributors}", title = "National Register of Historic Places listings in Union County, Ohio --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=National_Register_of_Historic_Places_listings_in_Union_County,_Ohio&oldid=1221629383", note = "[Online; accessed 4-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:1221629383, author = "{Wikipedia contributors}", title = "National Register of Historic Places listings in Union County, Ohio --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=National_Register_of_Historic_Places_listings_in_Union_County,_Ohio&oldid=1221629383}", note = "[Online; accessed 4-July-2024]" }