Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.

APA Citation Edition Citation

Kraus, E. H., & Slawson, C. B. (1947). Gems and gem materials (5th ed.). McGraw-Hill Book Company.

Chicago Citation Edition Citation

Kraus, Edward Henry, und Chester Baker Slawson. Gems and Gem Materials. 5th ed. New York: McGraw-Hill Book Company, 1947.

MLA Citation Edition Citation

Kraus, Edward Henry, und Chester Baker Slawson. Gems and Gem Materials. 5th ed. McGraw-Hill Book Company, 1947.