APA (7e ed.) Bronvermelding

Spencer, D. E., & Parkin, M. (1993). Microeconomics: Study guide (2nd. ed.). Addison-Wesley.

Chicago (17e ed.) Bronvermelding

Spencer, David E., en Michael Parkin. Microeconomics: Study Guide. 2nd. ed. Reading, Mass: Addison-Wesley, 1993.

MLA (9e ed.) Bronvermelding

Spencer, David E., en Michael Parkin. Microeconomics: Study Guide. 2nd. ed. Addison-Wesley, 1993.