APA način citiranja

Richard W Ojakangas. (1976). The earth: Past and present. New York: McGraw-Hill.

Čikaški stil citiranja

Richard W Ojakangas. The Earth: Past and Present. New York: McGraw-Hill, 1976.

MLA način citiranja

Richard W Ojakangas. The Earth: Past and Present. New York: McGraw-Hill, 1976.

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