APA (7th ed.) Citation

Holmes, D. L., & Holmes, A. (1969). Elements of physical geology. Ronald Press Co..

Chicago Style (17th ed.) Citation

Holmes, Doris L., and Arthur Holmes. Elements of Physical Geology. New York: Ronald Press Co., 1969.

MLA (9th ed.) Citation

Holmes, Doris L., and Arthur Holmes. Elements of Physical Geology. Ronald Press Co., 1969.