Cita APA (7th ed.)
Gemmological Association and Gem Testing Laboratory of Great Britain, Society of Jewellery Historians (Great Britain), & Gemmological Association of Great Britain (2007- ). (2005). Gems & jewellery. Gemmological Association and Gem Testing Laboratory of Great Britain : Society of Jewellery Historians.
Cita Chicago (17th ed.)
Gemmological Association and Gem Testing Laboratory of Great Britain, Society of Jewellery Historians (Great Britain), i Gemmological Association of Great Britain (2007- ). Gems & Jewellery. London: Gemmological Association and Gem Testing Laboratory of Great Britain : Society of Jewellery Historians, 2005.
Cita MLA (9th ed.)
Gemmological Association and Gem Testing Laboratory of Great Britain, et al. Gems & Jewellery. Gemmological Association and Gem Testing Laboratory of Great Britain : Society of Jewellery Historians, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.