Cita APA (7th ed.)

Clark, C. (1951). Conditions of economic progress (2nd ed.). Macmillan.

Cita Chicago (17th ed.)

Clark, Colin. Conditions of Economic Progress. 2nd ed. Lond.: Macmillan, 1951.

Cita MLA (8th ed.)

Clark, Colin. Conditions of Economic Progress. 2nd ed. Macmillan, 1951.