Dolgoff, A. (1996). Physical Geology. D.C. Heath and company.
Chicago Style (17th ed.) ZitazioaDolgoff, Anatole. Physical Geology. Lexington, Massachusetts Toronto: D.C. Heath and company, 1996.
MLA (9th ed.) ZitazioaDolgoff, Anatole. Physical Geology. D.C. Heath and company, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.