APA (7th ed.) Citation

Thornton, A. P. (1977). Imperialism in the twentieth century. Univ. of Minnesota Press.

Chicago Style (17th ed.) Citation

Thornton, Archibald P. Imperialism in the Twentieth Century. Minneapolis, MN: Univ. of Minnesota Press, 1977.

MLA (9th ed.) Citation

Thornton, Archibald P. Imperialism in the Twentieth Century. Univ. of Minnesota Press, 1977.