Peng, S., & Zhang, J. (2007). Engineering geology for underground rocks. Springer.
Chicago Style aipamenaPeng, Suping, and Jincai Zhang. Engineering Geology for Underground Rocks. Berlin ; New York: Springer, 2007.
MLA aipamenaPeng, Suping, and Jincai Zhang. Engineering Geology for Underground Rocks. Springer, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.