APA (7th ed.) Citation

BROCANDO, WOODWARD, & SMITH. (1994). Minerals & gemstones of the world. David & Charles.

Chicago Style (17th ed.) Citation

BROCANDO, WOODWARD, and SMITH. Minerals & Gemstones of the World. Devon: David & Charles, 1994.

MLA (8th ed.) Citation

BROCANDO, et al. Minerals & Gemstones of the World. David & Charles, 1994.