Cita APA (7th ed.)

Zimmerman, E. W. (1964). Introduction to world resources. Harper & Row.

Cita Chicago (17th ed.)

Zimmerman, Erich Walter. Introduction to World Resources. New York: Harper & Row, 1964.

Cita MLA (9th ed.)

Zimmerman, Erich Walter. Introduction to World Resources. Harper & Row, 1964.