Gaya APA

CIPRIANI, C. et al (1986). Simon & Schuster's Guide to Gems And Precious Stones . New York: Simon & Schuster, Inc.

Gaya MLA

CIPRIANI, Curzio. et al. "Simon & Schuster's Guide to Gems And Precious Stones". New York: Simon & Schuster, Inc, 1986. Text.