APA引文

Pennak, R. W. (1953). Fresh-water invertebrates of the United States. The Ronald Press.

Chicago Style (17th ed.) Citation

Pennak, Robert W. Fresh-water Invertebrates of the United States. New York: The Ronald Press, 1953.

MLA引文

Pennak, Robert W. Fresh-water Invertebrates of the United States. The Ronald Press, 1953.