APA (7e ed.) Bronvermelding

Friedman, M., & Friedman, R. D. (1980). Free to choose: A personal statement. Harcourt Brace Jovanovich.

Chicago (17e ed.) Bronvermelding

Friedman, Milton, en Rose D. Friedman. Free to Choose: A Personal Statement. New York: Harcourt Brace Jovanovich, 1980.

MLA (9e ed.) Bronvermelding

Friedman, Milton, en Rose D. Friedman. Free to Choose: A Personal Statement. Harcourt Brace Jovanovich, 1980.