APA (7e ed.) Bronvermelding

Gordon, S. D., & Dawson, G. G. (1991). Introductory Economics (7th ed.). D.C. Health and company.

Chicago (17e ed.) Bronvermelding

Gordon, Sanford D., en George G. Dawson. Introductory Economics. 7th ed. Toronto: D.C. Health and company, 1991.

MLA (9e ed.) Bronvermelding

Gordon, Sanford D., en George G. Dawson. Introductory Economics. 7th ed. D.C. Health and company, 1991.