Citazione Stile APA (7a Edizione)

Gotthelf, A., & Lennox, J. G. (2011). Metaethics, egoism, and virtue: Studies in Ayn Rand's normative theory. University of Pittsburgh Press.

Citazione stile Chigago Style (17a edizione)

Gotthelf, Allan, e James G. Lennox. Metaethics, Egoism, and Virtue: Studies in Ayn Rand's Normative Theory. Pittsburgh, Pennsylvania: University of Pittsburgh Press, 2011.

Citatione MLA (9a ed.)

Gotthelf, Allan, e James G. Lennox. Metaethics, Egoism, and Virtue: Studies in Ayn Rand's Normative Theory. University of Pittsburgh Press, 2011.