Trích dẫn APA

H Hediger. (1955). Studies of the Psychology and Behaviour of Captive Animals in Zoos and Circuss. Butterworths Scientific Publications.

Trích dẫn kiểu Chicago

H Hediger. Studies of the Psychology and Behaviour of Captive Animals in Zoos and Circuss. Butterworths Scientific Publications, 1955.

Trích dẫn MLA

H Hediger. Studies of the Psychology and Behaviour of Captive Animals in Zoos and Circuss. Butterworths Scientific Publications, 1955.

Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.