Cita APA (7th ed.)

Friedman, M., & Friedman, R. D. (1990). Free to choose: A personal statement (First Harvest/HBJ edition.). Harcourt Brace Jovanovich.

Cita Chicago (17th ed.)

Friedman, Milton, i Rose D. Friedman. Free to Choose: A Personal Statement. First Harvest/HBJ edition. San Diego: Harcourt Brace Jovanovich, 1990.

Cita MLA (8th ed.)

Friedman, Milton, i Rose D. Friedman. Free to Choose: A Personal Statement. First Harvest/HBJ edition. Harcourt Brace Jovanovich, 1990.