Needham, J. G., & Needham, P. R. (1962). A guide to the study of fresh-water biology (5th ed.). Holden-Day.
Citace podle Chicago (17th ed.)Needham, James George, a Paul Robert Needham. A Guide to the Study of Fresh-water Biology. 5th ed. San Francisco: Holden-Day, 1962.
Citace podle MLA (9th ed.)Needham, James George, a Paul Robert Needham. A Guide to the Study of Fresh-water Biology. 5th ed. Holden-Day, 1962.
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