Cita APA (7a ed.)

Hayward, F., & Baudrillart, A. (1937). Léon XIII. B. Grasset.

Cita Chicago Style (17a ed.)

Hayward, Fernand, y Alfred Baudrillart. Léon XIII. Paris: B. Grasset, 1937.

Cita MLA (9a ed.)

Hayward, Fernand, y Alfred Baudrillart. Léon XIII. B. Grasset, 1937.