Dyfyniad APA

A F Fraser & D M Broom. (1990). Farm animal behaviour and welfare (3.). CABI.

Dyfyniad Arddull Chicago

A F Fraser and D M Broom. Farm Animal Behaviour and Welfare. 3. CABI, 1990.

Dyfyniad MLA

A F Fraser and D M Broom. Farm Animal Behaviour and Welfare. 3. CABI, 1990.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.