Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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