APA (7th ed.) Citation

Dharmaratne, P. G. R. (2017). Gemmology. Gem and Jewellery Research and Training Institute.

Chicago Style (17th ed.) Citation

Dharmaratne, P. G. R. Gemmology. [s. l.]: Gem and Jewellery Research and Training Institute, 2017.

MLA (9th ed.) Citation

Dharmaratne, P. G. R. Gemmology. Gem and Jewellery Research and Training Institute, 2017.

Warning: These citations may not always be 100% accurate.