Pennak, R. . W. (1953). Freshwater invertebrates of the United States. Wiley.
Chicago Style (17th ed.) CitationPennak, Robert W. Freshwater Invertebrates of the United States. New York: Wiley, 1953.
MLA引文Pennak, Robert W. Freshwater Invertebrates of the United States. Wiley, 1953.
警告:這些引文格式不一定是100%准確.