APA (7th ed.) Citation

Doerr, A. H., & Guernsey, J. L. (1964). Principles of physical geography (2nd ed.). Barron's Educational Series.

Chicago Style (17th ed.) Citation

Doerr, Arthur H., and James Lee Guernsey. Principles of Physical Geography. 2nd ed. Woodbury, New York: Barron's Educational Series, 1964.

MLA (9th ed.) Citation

Doerr, Arthur H., and James Lee Guernsey. Principles of Physical Geography. 2nd ed. Barron's Educational Series, 1964.