APA (7th ed.) Citation

Kammerling, R. C. (1948). Popular gemology. John Wiley and Sons.

Chicago Style (17th ed.) Citation

Kammerling, Robert C. Popular Gemology. New York: John Wiley and Sons, 1948.

MLA (9th ed.) Citation

Kammerling, Robert C. Popular Gemology. John Wiley and Sons, 1948.

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