APA (7th ed.) Citation

Smith, H. G., & Phillips, F. C. (1958). Gemstones. Pitman Publishing Corporation.

Chicago Style (17th ed.) Citation

Smith, Herbert G.F, and F. C. Phillips. Gemstones. New York: Pitman Publishing Corporation, 1958.

MLA (9th ed.) Citation

Smith, Herbert G.F, and F. C. Phillips. Gemstones. Pitman Publishing Corporation, 1958.