Barcalow, E. (1992). Open questions: An introduction to philosophy. Wadsworth Pub.
Cita Chicago (17th ed.)Barcalow, Emmett. Open Questions: An Introduction to Philosophy. Belmont, Calif: Wadsworth Pub, 1992.
Cita MLA (9th ed.)Barcalow, Emmett. Open Questions: An Introduction to Philosophy. Wadsworth Pub, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.