Cita APA (7th ed.)

Flammarion, C., & Wenzel, K. (1894). Urania. Otto Rieckers Buchhandlung.

Cita Chicago (17th ed.)

Flammarion, Camille, i Karl Wenzel. Urania. Pforzheim: Otto Rieckers Buchhandlung, 1894.

Cita MLA (8th ed.)

Flammarion, Camille, i Karl Wenzel. Urania. Otto Rieckers Buchhandlung, 1894.