APA (7th ed.) Citation

Friedman, M., & Kuznets, S. S. (1945). Income from independent professional practice. [National Bureau of Economic Research].

Chicago Style (17th ed.) Citation

Friedman, Milton, and Simon Smith Kuznets. Income from Independent Professional Practice. New York: [National Bureau of Economic Research], 1945.

MLA (9th ed.) Citation

Friedman, Milton, and Simon Smith Kuznets. Income from Independent Professional Practice. [National Bureau of Economic Research], 1945.