@misc{ enwiki:1225845725, author = "{Wikipedia contributors}", title = "Niños Héroes --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Ni%C3%B1os_H%C3%A9roes&oldid=1225845725", note = "[Online; accessed 18-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:1225845725, author = "{Wikipedia contributors}", title = "Niños Héroes --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Ni%C3%B1os_H%C3%A9roes&oldid=1225845725}", note = "[Online; accessed 18-July-2024]" }