Cita APA (7th ed.)

Bense, M., & Walther, E. (1997). Philosophie. Metzler.

Cita Chicago (17th ed.)

Bense, Max, i Elisabeth Walther. Philosophie. Stuttgart [u.a.]: Metzler, 1997.

Cita MLA (8th ed.)

Bense, Max, i Elisabeth Walther. Philosophie. Metzler, 1997.