APA (7e ed.) Bronvermelding

Ekelund, R. B., & Tollison, R. D. (1994). Microeconomics (4th ed.). Harper Collins.

Chicago (17e ed.) Bronvermelding

Ekelund, Robert B., en Robert D. Tollison. Microeconomics. 4th ed. New York, N.Y: Harper Collins, 1994.

MLA (9e ed.) Bronvermelding

Ekelund, Robert B., en Robert D. Tollison. Microeconomics. 4th ed. Harper Collins, 1994.