Lenhoff, H. M. (1961). The biology of hydra: And of some other coelenterates, 1961. University of Miami Press.
Čikaški stil citiranja (17. izdanje)Lenhoff, Howard M. The Biology of Hydra: And of Some Other Coelenterates, 1961. Coral Gables, Florida: University of Miami Press, 1961.
MLA način citiranja (9. izdanje)Lenhoff, Howard M. The Biology of Hydra: And of Some Other Coelenterates, 1961. University of Miami Press, 1961.
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