Citazione Stile APA (7a Edizione)

Plummer, C. C. (2001). Physical geology: Featuring the smithsonian institution's journey through geology CD-ROM. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Plummer, Charles C. Physical Geology: Featuring the Smithsonian Institution's Journey Through Geology CD-ROM. Boston: McGraw-Hill, 2001.

Citatione MLA (9a ed.)

Plummer, Charles C. Physical Geology: Featuring the Smithsonian Institution's Journey Through Geology CD-ROM. McGraw-Hill, 2001.