@misc{ enwiki:1227957581, author = "{Wikipedia contributors}", title = "Melusine von der Schulenburg, Duchess of Kendal --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=Melusine_von_der_Schulenburg,_Duchess_of_Kendal&oldid=1227957581", note = "[Online; accessed 11-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:1227957581, author = "{Wikipedia contributors}", title = "Melusine von der Schulenburg, Duchess of Kendal --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=Melusine_von_der_Schulenburg,_Duchess_of_Kendal&oldid=1227957581}", note = "[Online; accessed 11-July-2024]" }