APA (7th ed.) Citation

Smith, R. D., Keynes, R. S., & Malthus, D. W. (1997). Three great economists. Oxford University Press.

Chicago Style (17th ed.) Citation

Smith, Raphael D.D, Robert Skidelsky Keynes, and Donald Winch Malthus. Three Great Economists. New York: Oxford University Press, 1997.

MLA (8th ed.) Citation

Smith, Raphael D.D, et al. Three Great Economists. Oxford University Press, 1997.