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AMA style

David Weinberg. "The Gem Guide". In Alexandrite Tsarstone Collectors Guide. August 12, 2011, 01:18 UTC. Available at: http://w.alexandrite.net/viewpage.html?id=WDD-003-00037. Accessed April 09, 2026.

APA style

"The Gem Guide". (2011, August 12). In Alexandrite Tsarstone Collectors Guide. Retrieved 09:51, April 09, 2026, from http://w.alexandrite.net/viewpage.html?id=WDD-003-00037.

Bluebook style

"The Gem Guide", http://w.alexandrite.net/viewpage.html?id=WDD-003-00037 (last visited April 09, 2026).

Bluebook: Harvard JOLT style

See Alexandrite Tsarstone Collectors Guide, "The Gem Guide", http://w.alexandrite.net/viewpage.html?id=WDD-003-00037 () (as of Apr. 09, 2026, 09:51 GMT).

CBE/CSE style

David Weinberg. "The Gem Guide". In Alexandrite Tsarstone Collectors Guide. 2011 Aug 12, 01:18 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2011 Aug 12, 01:18 UTC [cited 2026 Apr 09]. Available from: http://w.alexandrite.net/viewpage.html?id=WDD-003-00037.

Chicago style

David Weinberg, "The Gem Guide", http://w.alexandrite.net/viewpage.html?id=WDD-003-00037, (accessed April 09, 2026).

MLA style

"The Gem Guide". Alexandrite Tsarstone Collectors Guide. 12 Aug 2011, 01:18 UTC. 09 Apr 2026 http://w.alexandrite.net/viewpage.html?id=WDD-003-00037

MHRA style

David Weinberg, "The Gem Guide", Alexandrite Tsarstone Collectors Guide, 12 August 2011, 01:18 UTC, http://w.alexandrite.net/viewpage.html?id=WDD-003-00037 [accessed 09 April 2026].