Cita APA (7th ed.)

Clark, C. (1951). The conditions of economic progress (2d ed. completely rewritten.). Macmillan.

Cita Chicago (17th ed.)

Clark, Colin. The Conditions of Economic Progress. 2d ed. completely rewritten. London: Macmillan, 1951.

Cita MLA (9th ed.)

Clark, Colin. The Conditions of Economic Progress. 2d ed. completely rewritten. Macmillan, 1951.