Klopfer, P. H. (1973). Behavioral aspects of ecology (2a. ed.). Prentice-Hall.
Tohutoru Kātū Chicago (17th ed.)Klopfer, Peter H. Behavioral Aspects of Ecology. 2a. ed. Englewood Cliffs: Prentice-Hall, 1973.
Tohutoro MLA (9th ed.)Klopfer, Peter H. Behavioral Aspects of Ecology. 2a. ed. Prentice-Hall, 1973.
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