Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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