Cita APA (7th ed.)
Maritain, J., & Watkin, E. I. (1979). An introduction to philosophy (2 ed.). Sheed & Ward.
Cita Chicago (17th ed.)
Maritain, Jacques, i Edward Ingram Watkin. An Introduction to Philosophy. 2 ed. London: Sheed & Ward, 1979.
Cita MLA (9th ed.)
Maritain, Jacques, i Edward Ingram Watkin. An Introduction to Philosophy. 2 ed. Sheed & Ward, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.