Friedman, M., & Friedman, R. (2004). Libertada de elegir. RBA.
Tohutoru Kātū Chicago (17th ed.)Friedman, Milton, me Rose Friedman. Libertada De Elegir. Barcelona: RBA, 2004.
Tohutoro MLA (9th ed.)Friedman, Milton, me Rose Friedman. Libertada De Elegir. RBA, 2004.
Kia tūpato: Kāore pea ēnei kupu hautoa i te ōrite pū 100%.