Cita APA (7th ed.)

Geiler, H., & Ritter, J. (1952). Buntes Schmetterlingsbüchlein (1.-15. Tausend.). Wunderlich.

Cita Chicago (17th ed.)

Geiler, Heinz, i Jürgen Ritter. Buntes Schmetterlingsbüchlein. 1.-15. Tausend. Leipzig: Wunderlich, 1952.

Cita MLA (8th ed.)

Geiler, Heinz, i Jürgen Ritter. Buntes Schmetterlingsbüchlein. 1.-15. Tausend. Wunderlich, 1952.