APA (7th ed.) Citation

Smith, A. D. (1979). Nationalism in the twentieth century. New York Univ. Pr.

Chicago Style (17th ed.) Citation

Smith, Anthony D. Nationalism in the Twentieth Century. New York: New York Univ. Pr, 1979.

MLA (9th ed.) Citation

Smith, Anthony D. Nationalism in the Twentieth Century. New York Univ. Pr, 1979.