Citazione Stile APA (7a Edizione)

Polk, W. R. (1997). Neighbors & strangers: The fundamentals of foreign affairs. University of Chicago Press.

Citazione stile Chigago Style (17a edizione)

Polk, William R. Neighbors & Strangers: The Fundamentals of Foreign Affairs. Chicago: University of Chicago Press, 1997.

Citatione MLA (9a ed.)

Polk, William R. Neighbors & Strangers: The Fundamentals of Foreign Affairs. University of Chicago Press, 1997.