Krebs, C. J. (1999). Ecological methodology (2nd ed.). Menlo Park, Calif.: Benjamin/Cummings.
Trích dẫn kiểu ChicagoKrebs, Charles J. Ecological Methodology. 2nd ed. Menlo Park, Calif.: Benjamin/Cummings, 1999.
Deismireacht MLAKrebs, Charles J. Ecological Methodology. 2nd ed. Menlo Park, Calif.: Benjamin/Cummings, 1999.
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