Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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