APA (7e ed.) Bronvermelding

Samuelson, P. A. (1973). Economics (9a. ed.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Samuelson, Paul Anthony. Economics. 9a. ed. Nueva York: McGraw-Hill, 1973.

MLA (9e ed.) Bronvermelding

Samuelson, Paul Anthony. Economics. 9a. ed. McGraw-Hill, 1973.