Παραπομπή APA

G.W.Tyrrell. (2006). Principles of Petrology: An Introduction to the Science of Rocks. Surjeet.

Παραπομπή Chicago Style

G.W.Tyrrell. Principles of Petrology: An Introduction to the Science of Rocks. New Delhi: Surjeet, 2006.

Παραπομπή MLA

G.W.Tyrrell. Principles of Petrology: An Introduction to the Science of Rocks. Surjeet, 2006.