Lorenz, K. (1963). On aggression. Harcourt, Brace & World.
Lua i Stíl Chicago (17ú heag.)Lorenz, Konrad. On Aggression. New York, NY: Harcourt, Brace & World, 1963.
Lua MLA (9ú heag.)Lorenz, Konrad. On Aggression. Harcourt, Brace & World, 1963.
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