APA (7e ed.) Bronvermelding

SAMUELSON, P. A., & NORDHAUS, W. D. (1989). Macroeconomics: A version of economics.-- Ed.13. McGraw-Hill.

Chicago (17e ed.) Bronvermelding

SAMUELSON, Paul A., en William D. NORDHAUS. Macroeconomics: A Version of Economics.-- Ed.13. New York: McGraw-Hill, 1989.

MLA (9e ed.) Bronvermelding

SAMUELSON, Paul A., en William D. NORDHAUS. Macroeconomics: A Version of Economics.-- Ed.13. McGraw-Hill, 1989.