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AMA style

David Weinberg. "usambara effect". In Alexandrite Tsarstone Collectors Guide. July 26, 2026, 11:42 UTC. Available at: http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0. Accessed July 26, 2026.

APA style

"usambara effect". (2026, July 26). In Alexandrite Tsarstone Collectors Guide. Retrieved 11:42, July 26, 2026, from http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0.

Bluebook style

"usambara effect", http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0 (last visited July 26, 2026).

Bluebook: Harvard JOLT style

See Alexandrite Tsarstone Collectors Guide, "usambara effect", http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0 (See results 1 - 2 of about 2 for usambara effect) (as of Jul. 26, 2026, 11:42 GMT).

CBE/CSE style

David Weinberg. "usambara effect". In Alexandrite Tsarstone Collectors Guide. 2026 Jul 26, 11:42 UTC.[Internet], Alexandrite Tsarstone Collectors Guide; 2026 Jul 26, 11:42 UTC [cited 2026 Jul 26]. Available from: http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0.

Chicago style

David Weinberg, "usambara effect", http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0, (accessed July 26, 2026).

MLA style

"usambara effect". Alexandrite Tsarstone Collectors Guide. 26 Jul 2026, 11:42 UTC. 26 Jul 2026 http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0

MHRA style

David Weinberg, "usambara effect", Alexandrite Tsarstone Collectors Guide, 26 July 2026, 11:42 UTC, http://w.alexandrite.com/viewpage.html?id=ALXS-005-00001-1523-10-0 [accessed 26 July 2026].