APA (7th ed.) Citation

Dudenverlag. (1991). Duden. Dudenverlag.

Chicago Style (17th ed.) Citation

Dudenverlag. Duden. Mannheim: Dudenverlag, 1991.

MLA (8th ed.) Citation

Dudenverlag. Duden. Dudenverlag, 1991.

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