APA (7e ed.) Bronvermelding

SILK, L. S. (1975). Contemporary economics: Principles and Issues (2nd ed.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

SILK, Leonard S. Contemporary Economics: Principles and Issues. 2nd ed. New York: McGraw-Hill, 1975.

MLA (9e ed.) Bronvermelding

SILK, Leonard S. Contemporary Economics: Principles and Issues. 2nd ed. McGraw-Hill, 1975.