Cita APA (7a ed.)

Holtz-Baumert, G. (1990). Alfons Zitterbacke. Kinderbuchverlag.

Cita Chicago Style (17a ed.)

Holtz-Baumert, Gerhard. Alfons Zitterbacke. Berlin: Kinderbuchverlag, 1990.

Cita MLA (8a ed.)

Holtz-Baumert, Gerhard. Alfons Zitterbacke. Kinderbuchverlag, 1990.