APA (7th ed.) Citation

Dabba Smith, F. (2008). Der stille Helfer Ernst Leitz. Ernst Leitz.

Chicago Style (17th ed.) Citation

Dabba Smith, Frank. "Der Stille Helfer Ernst Leitz." Ernst Leitz 2008.

MLA (8th ed.) Citation

Dabba Smith, Frank. "Der Stille Helfer Ernst Leitz." Ernst Leitz, 2008.

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