Kullberg, C. (1998). Behaviour under predation risk in birds. Stockholm University, Dept. of Zoology.
Lua i Stíl Chicago (17ú heag.)Kullberg, Cecilia. Behaviour Under Predation Risk in Birds. Stockholm, Sweden: Stockholm University, Dept. of Zoology, 1998.
Lua MLA (8ú heag.)Kullberg, Cecilia. Behaviour Under Predation Risk in Birds. Stockholm University, Dept. of Zoology, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.