Cita APA (7th ed.)

Garve, C., & Wölfel, K. (1974). [Popularphilosophische., 2]. Metzler.

Cita Chicago (17th ed.)

Garve, Christian, i Kurt Wölfel. [Popularphilosophische., 2]. Stuttgart: Metzler, 1974.

Cita MLA (8th ed.)

Garve, Christian, i Kurt Wölfel. [Popularphilosophische., 2]. Metzler, 1974.