Citazione Stile APA (7a Edizione)

Willis,. (1981). Western civilization: An urban perspective (3rd ed.). D.C. Heath.

Citazione stile Chigago Style (17a edizione)

Willis. Western Civilization: An Urban Perspective. 3rd ed. Lexington: D.C. Heath, 1981.

Citatione MLA (9a ed.)

Willis. Western Civilization: An Urban Perspective. 3rd ed. D.C. Heath, 1981.