Παραπομπή APA

Plummer, C. C., & McGeary, D. (1996). Physical geology: : student study art notebook (7th ed.). Dubuque, IA.,: W.C.Brown.

Παραπομπή Chicago Style

Plummer, Charles C., and David McGeary. Physical Geology: : Student Study Art Notebook. 7th ed. Dubuque, IA.,: W.C.Brown, 1996.

Παραπομπή MLA

Plummer, Charles C., and David McGeary. Physical Geology: : Student Study Art Notebook. 7th ed. Dubuque, IA.,: W.C.Brown, 1996.

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