APA aipamena

Friedman, M. (1980). Free to choose: A personal statement. New York: Avon.

Chicago Style aipamena

Friedman, Milton. Free to Choose: A Personal Statement. New York: Avon, 1980.

MLA aipamena

Friedman, Milton. Free to Choose: A Personal Statement. New York: Avon, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.