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Citation styles for Projective hierarchy

APA style

Projective hierarchy. (2013, March 13). formulasearchengine. Retrieved 00:30, June 14, 2026 from https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983.

MLA style

"Projective hierarchy." formulasearchengine. 13 Mar 2013, 18:48 UTC. 14 Jun 2026, 00:30 <https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983>.

MHRA style

formulasearchengine contributors, 'Projective hierarchy', formulasearchengine, 13 March 2013, 18:48 UTC, <https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983> [accessed 14 June 2026]

Chicago style

formulasearchengine contributors, "Projective hierarchy," formulasearchengine, https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983 (accessed June 14, 2026).

CBE/CSE style

formulasearchengine contributors. Projective hierarchy [Internet]. formulasearchengine; 2013 Mar 13, 18:48 UTC [cited 2026 Jun 14]. Available from: https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983.

Bluebook style

Projective hierarchy, https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983 (last visited June 14, 2026).

BibTeX entry

 @misc{ wiki:xxx,
   author = "formulasearchengine",
   title = "Projective hierarchy --- formulasearchengine{,} ",
   year = "2013",
   url = "https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983",
   note = "[Online; accessed 14-June-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 = "formulasearchengine",
   title = "Projective hierarchy --- formulasearchengine{,} ",
   year = "2013",
   url = "\url{https://en.formulasearchengine.com/index.php?title=Projective_hierarchy&oldid=7983}",
   note = "[Online; accessed 14-June-2026]"
 }