Gaya APA

Philpotts, A, R., Ague, J, J. (2016). Principles of Igneous and Metamorphic Petrology second edition (Second Edition). Cambridge: Cambridge University Press.

Gaya MLA

Philpotts, Anthony, R.., Ague, Jay, J.. "Principles of Igneous and Metamorphic Petrology second edition". Second Edition Cambridge: Cambridge University Press, 2016. Text.