APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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