APA Citation

Schumann, W., Bradshaw, R., & Mills, K. (1993). Handbook of rocks, minerals, and gemstones. Boston: Houghton Mifflin Company.

Chicago Style Citation

Schumann, Walter, R. Bradshaw, and K.A.G Mills. Handbook of Rocks, Minerals, and Gemstones. Boston: Houghton Mifflin Company, 1993.

MLA Citation

Schumann, Walter, R. Bradshaw, and K.A.G Mills. Handbook of Rocks, Minerals, and Gemstones. Boston: Houghton Mifflin Company, 1993.

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