Gaya APA

UPT02138, ., Yardley, B, W. (1999). An introduction to metamorphic petrology (cet. 1). England: Pearson Education.

Gaya MLA

UPT02138, ., Yardley, Bruce, W.D. "An introduction to metamorphic petrology". cet. 1 England: Pearson Education, 1999. Text.