Bjork, W. B., & Schraer, W. D. (1987). Biology: The study of life (2nd ed., Teacher's ed.). CEBCO : Allyn and Bacon.
Čikaški stil citiranja (17. izdanje)Bjork, Warren B., i William D. Schraer. Biology: The Study of Life. 2nd ed., Teacher's ed. Newton, Mass.: CEBCO : Allyn and Bacon, 1987.
MLA način citiranja (8. izdanje)Bjork, Warren B., i William D. Schraer. Biology: The Study of Life. 2nd ed., Teacher's ed. CEBCO : Allyn and Bacon, 1987.
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