Citazione Stile APA (7a Edizione)

Peck, R. F., & Havighurst, R. J. (1960). The psychology of character development. John Wiley.

Citazione stile Chigago Style (17a edizione)

Peck, Robert F., e Robert J. Havighurst. The Psychology of Character Development. John Wiley, 1960.

Citatione MLA (9a ed.)

Peck, Robert F., e Robert J. Havighurst. The Psychology of Character Development. John Wiley, 1960.