Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.