@misc{ enwiki:15073735, author = "{Wikipedia contributors}", title = "Łękno --- {Wikipedia}{,} The Free Encyclopedia", year = "2005", url = "https://en.wikipedia.org/w/index.php?title=%C5%81%C4%99kno&oldid=15073735", note = "[Online; accessed 29-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:15073735, author = "{Wikipedia contributors}", title = "Łękno --- {Wikipedia}{,} The Free Encyclopedia", year = "2005", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=%C5%81%C4%99kno&oldid=15073735}", note = "[Online; accessed 29-June-2024]" }