Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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