APA (7e ed.) Bronvermelding

Gwartney, J. D. (1990). Economics: Private and public choice (5th ed.). Harcount brace jovanovich.

Chicago (17e ed.) Bronvermelding

Gwartney, James D. Economics: Private and Public Choice. 5th ed. San diego: Harcount brace jovanovich, 1990.

MLA (9e ed.) Bronvermelding

Gwartney, James D. Economics: Private and Public Choice. 5th ed. Harcount brace jovanovich, 1990.