Citazione Stile APA (7a Edizione)

Smith, R. F., Watts, M. W., & Hogan, V. D. (1981). Free enterprise - The American economic system. Laidlaw.

Citazione stile Chigago Style (17a edizione)

Smith, Robert Freeman, Michael W. Watts, e Vivian D. Hogan. Free Enterprise - The American Economic System. River Forest, Ill: Laidlaw, 1981.

Citatione MLA (9a ed.)

Smith, Robert Freeman, et al. Free Enterprise - The American Economic System. Laidlaw, 1981.