Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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