APA (7th ed.) Citation

Hansen, R. (2022). Gemstones: A concise reference guide. Princeton University Press.

Chicago Style (17th ed.) Citation

Hansen, Robin. Gemstones: A Concise Reference Guide. Princeton, New Jersey: Princeton University Press, 2022.

MLA (9th ed.) Citation

Hansen, Robin. Gemstones: A Concise Reference Guide. Princeton University Press, 2022.