APA (7th ed.) Citation

Hancock, W. K. (1961). Four studies of war and peace in this century. University Press.

Chicago Style (17th ed.) Citation

Hancock, W. K. Four Studies of War and Peace in This Century. Cambridge [England]: University Press, 1961.

MLA (9th ed.) Citation

Hancock, W. K. Four Studies of War and Peace in This Century. University Press, 1961.