@misc{ enwiki:1225130366, author = "{Wikipedia contributors}", title = "Postage stamps and postal history of Indochina --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Postage_stamps_and_postal_history_of_Indochina&oldid=1225130366", note = "[Online; accessed 7-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:1225130366, author = "{Wikipedia contributors}", title = "Postage stamps and postal history of Indochina --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Postage_stamps_and_postal_history_of_Indochina&oldid=1225130366}", note = "[Online; accessed 7-July-2024]" }