APA (7th ed.) Citation

Judge, A., Judge, C., & Pfeiffer, C. (2017). Mach deine eigene ... Spion Mission. Beltz & Gelberg.

Chicago Style (17th ed.) Citation

Judge, Andrew, Chris Judge, and Christina Pfeiffer. Mach Deine Eigene ... Spion Mission. Weinheim ; Basel: Beltz & Gelberg, 2017.

MLA (9th ed.) Citation

Judge, Andrew, et al. Mach Deine Eigene ... Spion Mission. Beltz & Gelberg, 2017.