Cita APA (7th ed.)

McGeary, D., & Plummer, C. C. (1992). Physical geology: Earth revealed. Wm. C. Brown.

Cita Chicago (17th ed.)

McGeary, David, i Charles C. Plummer. Physical Geology: Earth Revealed. Boulevard: Wm. C. Brown, 1992.

Cita MLA (9th ed.)

McGeary, David, i Charles C. Plummer. Physical Geology: Earth Revealed. Wm. C. Brown, 1992.