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AMA style

David Weinberg. "Definition of Alexandrite twinning". In Alexandrite Tsarstone Collectors Guide. July 03, 2010, 04:47 UTC. Available at: http://w.alexandrite.com/viewpage.html?id=GG-086-00007. Accessed June 01, 2026.

APA style

"Definition of Alexandrite twinning". (2010, July 03). In Alexandrite Tsarstone Collectors Guide. Retrieved 00:16, June 01, 2026, from http://w.alexandrite.com/viewpage.html?id=GG-086-00007.

Bluebook style

"Definition of Alexandrite twinning", http://w.alexandrite.com/viewpage.html?id=GG-086-00007 (last visited June 01, 2026).

Bluebook: Harvard JOLT style

See Alexandrite Tsarstone Collectors Guide, "Definition of Alexandrite twinning", http://w.alexandrite.com/viewpage.html?id=GG-086-00007 (Commonly twinned pseudohexagonal, as trillings, cyclic twin or flowers exist in some Russian alexandrite.) (as of Jun. 01, 2026, 00:16 GMT).

CBE/CSE style

David Weinberg. "Definition of Alexandrite twinning". In Alexandrite Tsarstone Collectors Guide. 2010 Jul 03, 04:47 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2010 Jul 03, 04:47 UTC [cited 2026 Jun 01]. Available from: http://w.alexandrite.com/viewpage.html?id=GG-086-00007.

Chicago style

David Weinberg, "Definition of Alexandrite twinning", http://w.alexandrite.com/viewpage.html?id=GG-086-00007, (accessed June 01, 2026).

MLA style

"Definition of Alexandrite twinning". Alexandrite Tsarstone Collectors Guide. 03 Jul 2010, 04:47 UTC. 01 Jun 2026 http://w.alexandrite.com/viewpage.html?id=GG-086-00007

MHRA style

David Weinberg, "Definition of Alexandrite twinning", Alexandrite Tsarstone Collectors Guide, 03 July 2010, 04:47 UTC, http://w.alexandrite.com/viewpage.html?id=GG-086-00007 [accessed 01 June 2026].