Hospers, J. (1971). Libertarianism, A political philosophy for tomorrow (Primera edición.). Reason Press.
Chicago Style (17. basım) AtıfHospers, John. Libertarianism, A Political Philosophy for Tomorrow. Primera edición. Santa Bárbara: Reason Press, 1971.
MLA (8th ed.) AtıfHospers, John. Libertarianism, A Political Philosophy for Tomorrow. Primera edición. Reason Press, 1971.
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