APA (7th ed.) Citation

Blyton, E. (1987). Rätsel um den tiefen Keller. Bertelsmann.

Chicago Style (17th ed.) Citation

Blyton, Enid. Rätsel Um Den Tiefen Keller. München: Bertelsmann, 1987.

MLA (9th ed.) Citation

Blyton, Enid. Rätsel Um Den Tiefen Keller. Bertelsmann, 1987.

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