Cita APA (7a ed.)

Clark, C. (1960). The conditions of economic progress (3th.ed.). Garland Pub..

Cita Chicago Style (17a ed.)

Clark, Colin. The Conditions of Economic Progress. 3th.ed. New York: Garland Pub., 1960.

Cita MLA (9a ed.)

Clark, Colin. The Conditions of Economic Progress. 3th.ed. Garland Pub., 1960.