Cita APA (7a ed.)

Goebel, J. (1950). Bürgerkunde. Beltz.

Cita Chicago Style (17a ed.)

Goebel, Josef. Bürgerkunde. Weinheim/Bergstr: Beltz, 1950.

Cita MLA (9a ed.)

Goebel, Josef. Bürgerkunde. Beltz, 1950.