Citation styles for Opium

APA style

Opium. (2017, April 2). DrugFacts, . Retrieved 23:43, January 23, 2026 from https://drugfacts.org.uk/index.php?title=Opium&oldid=201.

MLA style

"Opium." DrugFacts, . 2 Apr 2017, 14:12 UTC. 23 Jan 2026, 23:43 <https://drugfacts.org.uk/index.php?title=Opium&oldid=201>.

MHRA style

DrugFacts contributors, 'Opium', DrugFacts, , 2 April 2017, 14:12 UTC, <https://drugfacts.org.uk/index.php?title=Opium&oldid=201> [accessed 23 January 2026]

Chicago style

DrugFacts contributors, "Opium," DrugFacts, , https://drugfacts.org.uk/index.php?title=Opium&oldid=201 (accessed January 23, 2026).

CBE/CSE style

DrugFacts contributors. Opium [Internet]. DrugFacts, ; 2017 Apr 2, 14:12 UTC [cited 2026 Jan 23]. Available from: https://drugfacts.org.uk/index.php?title=Opium&oldid=201.

Bluebook style

Opium, https://drugfacts.org.uk/index.php?title=Opium&oldid=201 (last visited January 23, 2026).

BibTeX entry

 @misc{ wiki:xxx,
   author = "DrugFacts",
   title = "Opium --- DrugFacts{,} ",
   year = "2017",
   url = "https://drugfacts.org.uk/index.php?title=Opium&oldid=201",
   note = "[Online; accessed 23-January-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 = "DrugFacts",
   title = "Opium --- DrugFacts{,} ",
   year = "2017",
   url = "\url{https://drugfacts.org.uk/index.php?title=Opium&oldid=201}",
   note = "[Online; accessed 23-January-2026]"
 }