APA

(1966). The national system of political economy. New York: A. M. Kelley.

Chicago

1966. The national system of political economy. New York: A. M. Kelley.

Harvard

(1966). The national system of political economy. New York: A. M. Kelley.

MLA

The national system of political economy. New York: A. M. Kelley. 1966.