APA (7th ed.) Citation

Firsoff, V. A. (1974). Working with gemstones. Arco Pub. Co..

Chicago Style (17th ed.) Citation

Firsoff, V. A. Working with Gemstones. New York: Arco Pub. Co., 1974.

MLA (9th ed.) Citation

Firsoff, V. A. Working with Gemstones. Arco Pub. Co., 1974.