Cita APA

Friedman, M. 1., & Friedman, R. (1980). Free to choose: A personal statement. New York, New York: Avon.

Citación estilo Chicago

Friedman, Milton 1912, y Rose Friedman. Free to Choose: A Personal Statement. New York, New York: Avon, 1980.

Cita MLA

Friedman, Milton 1912, y Rose Friedman. Free to Choose: A Personal Statement. New York, New York: Avon, 1980.