@misc{ enwiki:1226070477, author = "{Wikipedia contributors}", title = "Aldeamayor de San Martín --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Aldeamayor_de_San_Mart%C3%ADn&oldid=1226070477", note = "[Online; accessed 10-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:1226070477, author = "{Wikipedia contributors}", title = "Aldeamayor de San Martín --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Aldeamayor_de_San_Mart%C3%ADn&oldid=1226070477}", note = "[Online; accessed 10-July-2024]" }