APA (7e ed.) Bronvermelding

Nobbs, J., & Hopkins, I. W. J. (1995). Economics: A core text (4th ed.). McGraw-Hill Book Co..

Chicago (17e ed.) Bronvermelding

Nobbs, Jack, en I. W. J. Hopkins. Economics: A Core Text. 4th ed. London ; New York: McGraw-Hill Book Co., 1995.

MLA (8e ed.) Bronvermelding

Nobbs, Jack, en I. W. J. Hopkins. Economics: A Core Text. 4th ed. McGraw-Hill Book Co., 1995.