Cita APA (7a ed.)

Blum, A. A. (1972). A history of the American labor movement. American Historical Association.

Cita Chicago Style (17a ed.)

Blum, Albert A. A History of the American Labor Movement. Washington: American Historical Association, 1972.

Cita MLA (9a ed.)

Blum, Albert A. A History of the American Labor Movement. American Historical Association, 1972.