APA način citiranja

Ojakangas, R. W., & Darby, D. G. (1976). The earth: :Past and present. Mc Graw Hills.

Čikaški stil citiranja

Ojakangas, Richard W., i David G. Darby. The Earth: :Past and Present. New York: Mc Graw Hills, 1976.

MLA način citiranja

Ojakangas, Richard W., i David G. Darby. The Earth: :Past and Present. Mc Graw Hills, 1976.