Citazione Stile APA (7a Edizione)

Pratt, J. W. (1967). Challenge and rejection: The United States and world leadership, 1900-1921. Macmilan.

Citazione stile Chigago Style (17a edizione)

Pratt, Julius William. Challenge and Rejection: The United States and World Leadership, 1900-1921. New York: Macmilan, 1967.

Citatione MLA (9a ed.)

Pratt, Julius William. Challenge and Rejection: The United States and World Leadership, 1900-1921. Macmilan, 1967.