APA (7th ed.) Citation

Boie, K., & Brix, S. (1990). Alles total geheim. Oetinger.

Chicago Style (17th ed.) Citation

Boie, Kirsten, and Silke Brix. Alles Total Geheim. Hamburg: Oetinger, 1990.

MLA (9th ed.) Citation

Boie, Kirsten, and Silke Brix. Alles Total Geheim. Oetinger, 1990.

Warning: These citations may not always be 100% accurate.