@misc{ enwiki:1229187199, author = "{Wikipedia contributors}", title = "Nam Định --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Nam_%C4%90%E1%BB%8Bnh&oldid=1229187199", note = "[Online; accessed 25-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:1229187199, author = "{Wikipedia contributors}", title = "Nam Định --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Nam_%C4%90%E1%BB%8Bnh&oldid=1229187199}", note = "[Online; accessed 25-July-2024]" }