Cita APA (7th ed.)

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.