APA Style

Robert W. Pennak), D, (, T, C, W, O. (2001 (July 20)). Pennak’s Freshwater Invertebrates of the United States: Porifera to Crustacea (4th Edition). New York (Wiley): John Wiley & Sons (Wiley).

MLA Style

Robert W. Pennak), Douglas Grant Smith, (revising, The, Classic, Work, Of. "Pennak’s Freshwater Invertebrates of the United States: Porifera to Crustacea". 4th Edition New York (Wiley): John Wiley & Sons (Wiley), 2001 (July 20). BOOK.