Cita APA (7a ed.)

Stroll, A., & Popkin, R. H. (1973). Philosophy and the human spirit: A brief introduction. Holt, Rinehart and Winston.

Cita Chicago Style (17a ed.)

Stroll, Avrum, y Richard H. Popkin. Philosophy and the Human Spirit: A Brief Introduction. New York [etc.]: Holt, Rinehart and Winston, 1973.

Cita MLA (9a ed.)

Stroll, Avrum, y Richard H. Popkin. Philosophy and the Human Spirit: A Brief Introduction. Holt, Rinehart and Winston, 1973.