Citazione Stile APA (7a Edizione)

Duck, S. (2007). Human relationships (4th ed.). Sage Pub.

Citazione stile Chigago Style (17a edizione)

Duck, Steve. Human Relationships. 4th ed. Los Angeles, Calif: Sage Pub, 2007.

Citatione MLA (9a ed.)

Duck, Steve. Human Relationships. 4th ed. Sage Pub, 2007.