APA (7e ed.) Bronvermelding

Diggins, J. P. (1973). The american left in the twentieth century. Harcourt, Brace, Jovanovich.

Chicago (17e ed.) Bronvermelding

Diggins, John P. The American Left in the Twentieth Century. New York [u.a.]: Harcourt, Brace, Jovanovich, 1973.

MLA (8e ed.) Bronvermelding

Diggins, John P. The American Left in the Twentieth Century. Harcourt, Brace, Jovanovich, 1973.