APA način citiranja

Cooper John D. (1990). A trip through time: Principles of historical geology (2nd ed.). Merril Publishing company.

Čikaški stil citiranja

Cooper John D. A Trip Through Time: Principles of Historical Geology. 2nd ed. London: Merril Publishing company, 1990.

MLA način citiranja

Cooper John D. A Trip Through Time: Principles of Historical Geology. 2nd ed. Merril Publishing company, 1990.