Kullberg, C. (1998). Behaviour under predation risk in birds. Stockholm University, Dept. of Zoology.
Citace podle Chicago (17th ed.)Kullberg, Cecilia. Behaviour Under Predation Risk in Birds. Stockholm, Sweden: Stockholm University, Dept. of Zoology, 1998.
Citace podle MLA (8th ed.)Kullberg, Cecilia. Behaviour Under Predation Risk in Birds. Stockholm University, Dept. of Zoology, 1998.
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