Lua APA (7ú heag.)

CLARK, C. (1960). The Conditions Of Economic Progress Colin Clark. Macmillan & Co.

Lua i Stíl Chicago (17ú heag.)

CLARK, Colin. The Conditions Of Economic Progress Colin Clark. Macmillan & Co, 1960.

Lua MLA (8ú heag.)

CLARK, Colin. The Conditions Of Economic Progress Colin Clark. Macmillan & Co, 1960.

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