APA (7th ed.) Citation

Roberts, W. L., Campbell, T. J., & Rapp, G. (1990). Encyclopedia of minerals (2. ed.). VanNostrand Reinhold.

Chicago Style (17th ed.) Citation

Roberts, Willard L., Thomas J. Campbell, and George Rapp. Encyclopedia of Minerals. 2. ed. New York: VanNostrand Reinhold, 1990.

MLA (9th ed.) Citation

Roberts, Willard L., et al. Encyclopedia of Minerals. 2. ed. VanNostrand Reinhold, 1990.