APA (7th ed.) Citation

Smith, A. (1976). The wealth of nations: Books 1-3. Penguin Books.

Chicago Style (17th ed.) Citation

Smith, Adam. The Wealth of Nations: Books 1-3. Harmondsworth [u.a.]: Penguin Books, 1976.

MLA (9th ed.) Citation

Smith, Adam. The Wealth of Nations: Books 1-3. Penguin Books, 1976.