Citazione Stile APA (7a Edizione)

Gutkind, E. (1967). International history of city: Development. Free pr.

Citazione stile Chigago Style (17a edizione)

Gutkind, E.A. International History of City: Development. New York: Free pr, 1967.

Citatione MLA (9a ed.)

Gutkind, E.A. International History of City: Development. Free pr, 1967.