APA

Soule G. H., . (1952). Economic forces in American history. New York: Sloane.

Chicago

Soule George Henry, . 1952. Economic forces in American history. New York: Sloane.

Harvard

Soule G. H., . (1952). Economic forces in American history. New York: Sloane.

MLA

Soule George Henry, . Economic forces in American history. New York: Sloane. 1952.