Cita APA (7th ed.)

Maritain, J. (1948). A preface to metaphysics. Sheed and Ward.

Cita Chicago (17th ed.)

Maritain, Jacques. A Preface to Metaphysics. Nueva York: Sheed and Ward, 1948.

Cita MLA (9th ed.)

Maritain, Jacques. A Preface to Metaphysics. Sheed and Ward, 1948.