@misc{ enwiki:1195683855, author = "{Wikipedia contributors}", title = "2011 MD --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=2011_MD&oldid=1195683855", note = "[Online; accessed 1-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:1195683855, author = "{Wikipedia contributors}", title = "2011 MD --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=2011_MD&oldid=1195683855}", note = "[Online; accessed 1-July-2024]" }