Gaya APA

Philpotts, A, R., Ague, J, J. (2009). Principles of igneous and metamorphic petrology (ed. 2). United Kingdom: Cambridge University Press.

Gaya MLA

Philpotts, Anthony, R.., Ague, Jay, J.. "Principles of igneous and metamorphic petrology". ed. 2 United Kingdom: Cambridge University Press, 2009. Text.