APA-ийн эшлэл(7 дахь хэвлэлт)

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

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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

MLA -ийн эшлэл (9 дэх хэвлэлт)

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