Friedman, M. (1980). Free to choose: A personal statement. New York: Avon.
Chicago Style aipamenaFriedman, Milton. Free to Choose: A Personal Statement. New York: Avon, 1980.
MLA aipamenaFriedman, Milton. Free to Choose: A Personal Statement. New York: Avon, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.