Dyfyniad APA

Carlson, D. H., & Plummer,Charles C. McGeary, D. (2006). Physical geology: Earth revealed (6th ed.). McGraw Hill.

Dyfyniad Arddull Chicago

Carlson, Diane H., and David Plummer,Charles C. McGeary. Physical Geology: Earth Revealed. 6th ed. Boston: McGraw Hill, 2006.

Dyfyniad MLA

Carlson, Diane H., and David Plummer,Charles C. McGeary. Physical Geology: Earth Revealed. 6th ed. McGraw Hill, 2006.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.