Citazione Stile APA (7a Edizione)

Spiegel, H. W. (1971). The growth of economic thought. Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Spiegel, Henry William. The Growth of Economic Thought. Englewood Cliffs, N.J: Prentice-Hall, 1971.

Citatione MLA (9a ed.)

Spiegel, Henry William. The Growth of Economic Thought. Prentice-Hall, 1971.