@misc{ enwiki:1203327841, author = "{Wikipedia contributors}", title = "2008 Société Générale trading loss --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=2008_Soci%C3%A9t%C3%A9_G%C3%A9n%C3%A9rale_trading_loss&oldid=1203327841", note = "[Online; accessed 13-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:1203327841, author = "{Wikipedia contributors}", title = "2008 Société Générale trading loss --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=2008_Soci%C3%A9t%C3%A9_G%C3%A9n%C3%A9rale_trading_loss&oldid=1203327841}", note = "[Online; accessed 13-July-2024]" }