APA (7th ed.) Citation

Korey, E. L., & Runge, E. J. (1939). Economics: Principles and problems. Longmans, Green and Co..

Chicago Style (17th ed.) Citation

Korey, Edward L., and Edmond Joseph Runge. Economics: Principles and Problems. New York: Longmans, Green and Co., 1939.

MLA (8th ed.) Citation

Korey, Edward L., and Edmond Joseph Runge. Economics: Principles and Problems. Longmans, Green and Co., 1939.