Plummer, C. C. (2010). Physical geology. New York, NY: McGraw-Hill.
Chicago Style aipamenaPlummer, Charles C. Physical Geology. New York, NY: McGraw-Hill, 2010.
MLA aipamenaPlummer, Charles C. Physical Geology. New York, NY: McGraw-Hill, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.