APA (7th ed.) Citation

Kraus, E. H., & Slawson, C. B. (1947). Gems and gem materials (Fifth edition.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Kraus, Edward Henry, and Chester Baker Slawson. Gems and Gem Materials. Fifth edition. New York: McGraw-Hill, 1947.

MLA (9th ed.) Citation

Kraus, Edward Henry, and Chester Baker Slawson. Gems and Gem Materials. Fifth edition. McGraw-Hill, 1947.