एपीए उद्धरण

Hopster, H. (1998). Coping strategies in dairy cows. Lelystad.

शिकागो स्टाइल उद्धरण

Hopster, Hans. Coping Strategies in Dairy Cows. Lelystad, 1998.

एमएलए उद्धरण

Hopster, Hans. Coping Strategies in Dairy Cows. Lelystad, 1998.