Sellars, W., & Hospers, J. (1952). Readings in ethical theory: Selected and ed. by Wilfrid Sellars and John Hospers. Appleton, Century, Crofts.

Sellars, Wilfrid, and John Hospers. Readings in Ethical Theory: Selected and Ed. by Wilfrid Sellars and John Hospers. New York: Appleton, Century, Crofts, 1952.

Sellars, Wilfrid, and John Hospers. Readings in Ethical Theory: Selected and Ed. by Wilfrid Sellars and John Hospers. Appleton, Century, Crofts, 1952.