Problems of moral philosophy an introduction to ethics por Taylor, Paul W.

Principles of ethics an introduction por Taylor, Paul W.

Knowledge and value por Sprague, Elmer, ed

Problems of moral philosophy an introduction to ethics

Normative discourse por Taylor, Paul W.

Knowledge and value introductory readings in philosophy por Sprague, Elmer, ed

Knowledge and value introductory readings in philosophy por Sprague, Elmer