@misc{ enwiki:1226446278, author = "{Wikipedia contributors}", title = "Blood plasma fractionation --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Blood_plasma_fractionation&oldid=1226446278", note = "[Online; accessed 22-June-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:1226446278, author = "{Wikipedia contributors}", title = "Blood plasma fractionation --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Blood_plasma_fractionation&oldid=1226446278}", note = "[Online; accessed 22-June-2024]" }