Cita APA (7a ed.)

Colwell, R. (1970). Introduction to backpacking. Stackpole Books.

Cita Chicago Style (17a ed.)

Colwell, Robert. Introduction to Backpacking. [Harrisburg, Pa.]: Stackpole Books, 1970.

Cita MLA (8a ed.)

Colwell, Robert. Introduction to Backpacking. Stackpole Books, 1970.