Cita APA (7th ed.)

Marcel, G. (1967). Problematic man. Herder and Herder.

Cita Chicago (17th ed.)

Marcel, Gabriel. Problematic Man. [New York]: Herder and Herder, 1967.

Cita MLA (9th ed.)

Marcel, Gabriel. Problematic Man. Herder and Herder, 1967.