@misc{ enwiki:1222860832, author = "{Wikipedia contributors}", title = "St Mary's Christian Brothers' Grammar School, Belfast --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", url = "https://en.wikipedia.org/w/index.php?title=St_Mary%27s_Christian_Brothers%27_Grammar_School,_Belfast&oldid=1222860832", note = "[Online; accessed 12-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:1222860832, author = "{Wikipedia contributors}", title = "St Mary's Christian Brothers' Grammar School, Belfast --- {Wikipedia}{,} The Free Encyclopedia", year = "2024", howpublished = "\url{https://en.wikipedia.org/w/index.php?title=St_Mary%27s_Christian_Brothers%27_Grammar_School,_Belfast&oldid=1222860832}", note = "[Online; accessed 12-July-2024]" }