Oparin, A. I. (1968). The origin and initial development of life. National Aeronautics and Space Administration ; for sale by the Clearinghouse for Federal Scientific and Technical Information.
Čikaški stil citiranja (17. izdanje)Oparin, Aleksandr Ivanovich. The Origin and Initial Development of Life. [Washington, D.C.] : Springfireld, Va.: National Aeronautics and Space Administration ; for sale by the Clearinghouse for Federal Scientific and Technical Information, 1968.
MLA način citiranja (8. izdanje)Oparin, Aleksandr Ivanovich. The Origin and Initial Development of Life. National Aeronautics and Space Administration ; for sale by the Clearinghouse for Federal Scientific and Technical Information, 1968.
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