Citazione Stile APA (7a Edizione)

Plummer, C. C. (2009). Physical geology & the environment (Second Canadian edition, custom replacement version.). McGraw-Hill Ryerson.

Citazione stile Chigago Style (17a edizione)

Plummer, Charles C. Physical Geology & the Environment. Second Canadian edition, custom replacement version. Toronto, Canada: McGraw-Hill Ryerson, 2009.

Citatione MLA (9a ed.)

Plummer, Charles C. Physical Geology & the Environment. Second Canadian edition, custom replacement version. McGraw-Hill Ryerson, 2009.