Cita APA (7th ed.)

Pearl, R. M. (1955). How to know the minerals and rocks. McGraw-Hill.

Cita Chicago (17th ed.)

Pearl, Richard Maxwell. How to Know the Minerals and Rocks. New York: McGraw-Hill, 1955.

Cita MLA (9th ed.)

Pearl, Richard Maxwell. How to Know the Minerals and Rocks. McGraw-Hill, 1955.