A F Fraser & D M Broom. (1990). Farm animal behaviour and welfare (3.). CABI.
Chicago Edition CitationA F Fraser and D M Broom. Farm Animal Behaviour and Welfare. 3. CABI, 1990.
MLA Edition CitationA F Fraser and D M Broom. Farm Animal Behaviour and Welfare. 3. CABI, 1990.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.