Cita APA (7a ed.)

Kirkaldy, J. F. (1955). General principles of geology. Philosophical Library.

Cita Chicago Style (17a ed.)

Kirkaldy, J. F. General Principles of Geology. New York: Philosophical Library, 1955.

Cita MLA (9a ed.)

Kirkaldy, J. F. General Principles of Geology. Philosophical Library, 1955.