APA

Cohen W. I., Perkins B., . (1993). The Cambridge history of American foreign relations. Cambridge: Cambridge University Press.

Chicago

Cohen Warren I, Perkins Bradford, . 1993. The Cambridge history of American foreign relations. Cambridge: Cambridge University Press.

Harvard

Cohen W. I., Perkins B., . (1993). The Cambridge history of American foreign relations. Cambridge: Cambridge University Press.

MLA

Cohen Warren I, Perkins Bradford, . The Cambridge history of American foreign relations. Cambridge: Cambridge University Press. 1993.