APA (7th ed.) Citation

Bauer Max Hermann, Spencer L. J., & Olsen Edward. (1968). Precious stones: A popular account of their characters.. Dover.

Chicago Style (17th ed.) Citation

Bauer Max Hermann, Spencer L. J., and Olsen Edward. Precious Stones: A Popular Account of Their Characters.. Dover, 1968.

MLA (8th ed.) Citation

Bauer Max Hermann, et al. Precious Stones: A Popular Account of Their Characters.. Dover, 1968.

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