@misc{ enwiki:751000239, author = "{Wikipedia contributors}", title = "Project Vela --- {Wikipedia}{,} The Free Encyclopedia", year = "2016", url = "https://en.wikipedia.org/w/index.php?title=Project_Vela&oldid=751000239", note = "[Online; accessed 9-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:751000239, author = "{Wikipedia contributors}", title = "Project Vela --- {Wikipedia}{,} The Free Encyclopedia", year = "2016", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Project_Vela&oldid=751000239}", note = "[Online; accessed 9-July-2024]" }