Engstrom, S. P., Whiting, J., & Engstrom, S. (1998). Aristotle, Kant, and the Stoics: Rethinking happiness and duty. [Cambridge]: Cambridge University Press.
Παραπομπή Chicago StyleEngstrom, Stephen Philip, Jennifer Whiting, and Stephen Engstrom. Aristotle, Kant, and the Stoics: Rethinking Happiness and Duty. [Cambridge]: Cambridge University Press, 1998.
Παραπομπή MLAEngstrom, Stephen Philip, Jennifer Whiting, and Stephen Engstrom. Aristotle, Kant, and the Stoics: Rethinking Happiness and Duty. [Cambridge]: Cambridge University Press, 1998.
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