Não informado. (1893). Contributions from the Zoological Laboratory of the University of Pennsylvania. University of Pennsylvania, Zoological Laboratory.
Čikaški stil citiranja (17. izdanje)Não informado. Contributions from the Zoological Laboratory of the University of Pennsylvania. Philadelphia, Pa: University of Pennsylvania, Zoological Laboratory, 1893.
MLA način citiranja (8. izdanje)Não informado. Contributions from the Zoological Laboratory of the University of Pennsylvania. University of Pennsylvania, Zoological Laboratory, 1893.
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