Smith, D. G. (2001). Pennak's freshwater invertebrates of the United States: Porifera to Crustacea. New York: John Wiley & Sons.
Trích dẫn kiểu ChicagoSmith, Douglas Grant. Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea. New York: John Wiley & Sons, 2001.
MLA citiranjeSmith, Douglas Grant. Pennak's Freshwater Invertebrates of the United States: Porifera to Crustacea. New York: John Wiley & Sons, 2001.
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