@misc{ enwiki:1002252514, author = "{Wikipedia contributors}", title = "São Tomé and Príncipe at the 2012 Summer Olympics --- {Wikipedia}{,} The Free Encyclopedia", year = "2021", url = "https://en.wikipedia.org/w/index.php?title=S%C3%A3o_Tom%C3%A9_and_Pr%C3%ADncipe_at_the_2012_Summer_Olympics&oldid=1002252514", note = "[Online; accessed 14-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:1002252514, author = "{Wikipedia contributors}", title = "São Tomé and Príncipe at the 2012 Summer Olympics --- {Wikipedia}{,} The Free Encyclopedia", year = "2021", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=S%C3%A3o_Tom%C3%A9_and_Pr%C3%ADncipe_at_the_2012_Summer_Olympics&oldid=1002252514}", note = "[Online; accessed 14-July-2024]" }