APA Citation

Cornelius S Hurlbut Jr, G. S. S. (1979). Gemology. A Wiley Interscience.

Chicago Style Citation

Cornelius S Hurlbut Jr, George S Switzer. Gemology. A Wiley Interscience, 1979.

MLA Citation

Cornelius S Hurlbut Jr, George S Switzer. Gemology. A Wiley Interscience, 1979.

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