Sutherland, W. J. (1996). Ecological Census Techniques: A Handbook (2nd ed.). Cambridge University.
Tohutoru Kātū Chicago (17th ed.)Sutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge: Cambridge University, 1996.
Tohutoro MLA (9th ed.)Sutherland, William J. Ecological Census Techniques: A Handbook. 2nd ed. Cambridge University, 1996.
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