Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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