APA

Ullman R.H, . (1961). Intervention and the War. Princeton: Princeton University Press.

Chicago

Ullman R.H, . 1961. Intervention and the War. Princeton: Princeton University Press.

Harvard

Ullman R.H, . (1961). Intervention and the War. Princeton: Princeton University Press.

MLA

Ullman R.H, . Intervention and the War. Princeton: Princeton University Press. 1961.