Cita APA (7th ed.)

Tyrrell, G. W. (1998). The Principles of Petrology: An Introduction to the Science of Rocks (2nd ed.). CBS Publishers & Distributors.

Cita Chicago (17th ed.)

Tyrrell, G. W. The Principles of Petrology: An Introduction to the Science of Rocks. 2nd ed. New Delhi: CBS Publishers & Distributors, 1998.

Cita MLA (9th ed.)

Tyrrell, G. W. The Principles of Petrology: An Introduction to the Science of Rocks. 2nd ed. CBS Publishers & Distributors, 1998.