APA aipamena

Plummer, C. C. (1999). Physical geology. WCB/McGraw-Hill.

Chicago Style aipamena

Plummer, Charles C. Physical Geology. WCB/McGraw-Hill, 1999.

MLA aipamena

Plummer, Charles C. Physical Geology. WCB/McGraw-Hill, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.