Cita APA (7a ed.)

Pearl, R. M. (1955). How to know the minerals and rocks. Signet.

Cita Chicago Style (17a ed.)

Pearl, Richard M. How to Know the Minerals and Rocks. Nueva York: Signet, 1955.

Cita MLA (8a ed.)

Pearl, Richard M. How to Know the Minerals and Rocks. Signet, 1955.