APA استشهاد

Simpson, G. G. (1960). Quantitative zoology/2nd ed (2nd ed.). Harcourt.

استشهاد بنمط شيكاغو

Simpson, George Gaylord. Quantitative Zoology/2nd Ed. 2nd ed. New york: Harcourt, 1960.

MLA استشهاد

Simpson, George Gaylord. Quantitative Zoology/2nd Ed. 2nd ed. Harcourt, 1960.