Cita APA (7a ed.)

Tyrrell, G. W. (1929). The principles of petrology: An introduction to the science of rocks ([2nd ed.].). Methuen.

Cita Chicago Style (17a ed.)

Tyrrell, G. W. The Principles of Petrology: An Introduction to the Science of Rocks. [2nd ed.]. London: Methuen, 1929.

Cita MLA (8a ed.)

Tyrrell, G. W. The Principles of Petrology: An Introduction to the Science of Rocks. [2nd ed.]. Methuen, 1929.