Bernard W. Pipkin. (2005). Geology and the environment. Australia: Thomson.
Chicago Style aipamenaBernard W. Pipkin. Geology and the Environment. Australia: Thomson, 2005.
MLA aipamenaBernard W. Pipkin. Geology and the Environment. Australia: Thomson, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.