Pennak, R. W. (1978). Fresh-water invertebrates of the United States (2d ed.). Wiley.
Chicagoスタイル(17版)引用形式Pennak, Robert W. Fresh-water Invertebrates of the United States. 2d ed. New York: Wiley, 1978.
MLA(9版)引用形式Pennak, Robert W. Fresh-water Invertebrates of the United States. 2d ed. Wiley, 1978.
警告: この引用は必ずしも正確ではありません.