Cita APA (7a ed.)

Pieper, A., & Thurnherr, U. (1994). Was sollen Philosophen lesen? Schmidt.

Cita Chicago Style (17a ed.)

Pieper, Annemarie, y Urs Thurnherr. Was Sollen Philosophen Lesen? Berlin: Schmidt, 1994.

Cita MLA (9a ed.)

Pieper, Annemarie, y Urs Thurnherr. Was Sollen Philosophen Lesen? Schmidt, 1994.