Cita APA (7a ed.)

Navarra, J. G. (1973). Our physical environment: The physical science. Harper & Row.

Cita Chicago Style (17a ed.)

Navarra, John Gabriel. Our Physical Environment: The Physical Science. New York: Harper & Row, 1973.

Cita MLA (9a ed.)

Navarra, John Gabriel. Our Physical Environment: The Physical Science. Harper & Row, 1973.