Cita APA (7th ed.)
Gordon, S. D., & Dawson, G. G. (1991). Introductory Economics (7th ed.). D.C. Health and company.
Cita Chicago (17th ed.)
Gordon, Sanford D., i George G. Dawson. Introductory Economics. 7th ed. Toronto: D.C. Health and company, 1991.
Cita MLA (9th ed.)
Gordon, Sanford D., i George G. Dawson. Introductory Economics. 7th ed. D.C. Health and company, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.