Gaya APA

Philpotts, A, R, (, R., Ague, J, J. (2009). Principles of Igneous and Metamorphic Petrology (2nd ed.). cambridge: Cambridge University Press.

Gaya MLA

Philpotts, Anthony, R., (Anthony, Robert),., Ague, Jay, J.. "Principles of Igneous and Metamorphic Petrology". 2nd ed. cambridge: Cambridge University Press, 2009. print.