APA-viite (7. p.)

Spiegel, H. W. (1971). The growth of economic thought. Duke U.Pr.

Chicago-viite (17. p.)

Spiegel, Henry William. The Growth of Economic Thought. Durham: Duke U.Pr, 1971.

MLA-viite (9. p.)

Spiegel, Henry William. The Growth of Economic Thought. Duke U.Pr, 1971.