MLA

Smith, Adam, and Roy Hutcheson Campbell. An Inquiry Into the Nature and Causes of the Wealth of Nations. Oxford: Clarendon press, 1976.

APA

Smith, A., & Campbell, R. Hutcheson. (1976). An inquiry into the nature and causes of the wealth of nations. Oxford: Clarendon press.

Chicago

Smith, Adam, An Inquiry Into the Nature and Causes of the Wealth of Nations. Edited by Roy Hutcheson Campbell. Oxford: Clarendon press, 1976.