Gwartney, J. D., Macpherson, D. A., Sobel, R. S., & Stroup, R. Economics: Private and public choice (16th edition.).

Gwartney, James D.,, David A. Macpherson, Russell S. Sobel, و Richard Stroup. Economics: Private and Public Choice. 16th edition.

Gwartney, James D.,, David A. Macpherson, Russell S. Sobel, و Richard Stroup. Economics: Private and Public Choice. 16th edition.