Citation styles for Hard water

APA style

Hard water. (2006, February 8). Opengenome.net, . Retrieved 08:39, February 4, 2026 from http://Opengenome.net/index.php?title=Hard_water&oldid=5340.

MLA style

"Hard water." Opengenome.net, . 8 Feb 2006, 05:22 UTC. 4 Feb 2026, 08:39 <http://Opengenome.net/index.php?title=Hard_water&oldid=5340>.

MHRA style

Opengenome.net contributors, 'Hard water', Opengenome.net, , 8 February 2006, 05:22 UTC, <http://Opengenome.net/index.php?title=Hard_water&oldid=5340> [accessed 4 February 2026]

Chicago style

Opengenome.net contributors, "Hard water," Opengenome.net, , http://Opengenome.net/index.php?title=Hard_water&oldid=5340 (accessed February 4, 2026).

CBE/CSE style

Opengenome.net contributors. Hard water [Internet]. Opengenome.net, ; 2006 Feb 8, 05:22 UTC [cited 2026 Feb 4]. Available from: http://Opengenome.net/index.php?title=Hard_water&oldid=5340.

Bluebook style

Hard water, http://Opengenome.net/index.php?title=Hard_water&oldid=5340 (last visited February 4, 2026).

BibTeX entry

 @misc{ wiki:xxx,
   author = "Opengenome.net",
   title = "Hard water --- Opengenome.net{,} ",
   year = "2006",
   url = "http://Opengenome.net/index.php?title=Hard_water&oldid=5340",
   note = "[Online; accessed 4-February-2026]"
 }

When using the LaTeX package url (\usepackage{url} somewhere in the preamble) which tends to give much more nicely formatted web addresses, the following may be preferred:

 @misc{ wiki:xxx,
   author = "Opengenome.net",
   title = "Hard water --- Opengenome.net{,} ",
   year = "2006",
   url = "\url{http://Opengenome.net/index.php?title=Hard_water&oldid=5340}",
   note = "[Online; accessed 4-February-2026]"
 }