Dyfyniad APA

Montgomery, C. W. (1992). Environmental geology (3rd ed.). Wm. C. Brown.

Dyfyniad Arddull Chicago

Montgomery, Carla W. Environmental Geology. 3rd ed. Dubuque, Iowa: Wm. C. Brown, 1992.

Dyfyniad MLA

Montgomery, Carla W. Environmental Geology. 3rd ed. Wm. C. Brown, 1992.

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