APA (7e ed.) Bronvermelding

Trettien, A. W. (1935). Why we feel that way: An analysis of the human emotions. Stratford.

Chicago (17e ed.) Bronvermelding

Trettien, Augustus William. Why We Feel That Way: An Analysis of the Human Emotions. Boston: Stratford, 1935.

MLA (9e ed.) Bronvermelding

Trettien, Augustus William. Why We Feel That Way: An Analysis of the Human Emotions. Stratford, 1935.