Cita APA (7th ed.)

Brock, P. (1975). Die Wunderbrille. Kinderbuchverlag.

Cita Chicago (17th ed.)

Brock, Peter. Die Wunderbrille. Berlin: Kinderbuchverlag, 1975.

Cita MLA (8th ed.)

Brock, Peter. Die Wunderbrille. Kinderbuchverlag, 1975.