Citazione Stile APA (7a Edizione)

Nichols, D. A., & Reynolds, C. W. (1971). Principles of economics. Holt, Rinehart and Winston.

Citazione stile Chigago Style (17a edizione)

Nichols, Donald A., e Clark W. Reynolds. Principles of Economics. Nueva York: Holt, Rinehart and Winston, 1971.

Citatione MLA (9a ed.)

Nichols, Donald A., e Clark W. Reynolds. Principles of Economics. Holt, Rinehart and Winston, 1971.