APA

Cahn W., . (1972). A pictorial history of American labor. New York: Crown Publishers.

Chicago

Cahn William, . 1972. A pictorial history of American labor. New York: Crown Publishers.

Harvard

Cahn W., . (1972). A pictorial history of American labor. New York: Crown Publishers.

MLA

Cahn William, . A pictorial history of American labor. New York: Crown Publishers. 1972.