Cita APA (7th ed.)

Holmes, A. (1978). Principles of physical geology. E.L.B.S..

Cita Chicago (17th ed.)

Holmes, Arthur. Principles of Physical Geology. London: E.L.B.S., 1978.

Cita MLA (9th ed.)

Holmes, Arthur. Principles of Physical Geology. E.L.B.S., 1978.