Παραπομπή σε μορφή APA (7η εκδ.)

Wolff, P. H. (1987). The development of behavioral states and the expression of emotions in early infancy: New proposals for investigation. The University of Chicago Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Wolff, Peter H. The Development of Behavioral States and the Expression of Emotions in Early Infancy: New Proposals for Investigation. Chicago: The University of Chicago Press, 1987.

Παραπομπή σε μορφή MLA (9th εκδ.)

Wolff, Peter H. The Development of Behavioral States and the Expression of Emotions in Early Infancy: New Proposals for Investigation. The University of Chicago Press, 1987.