APA (7th ed.) Citation

Jaedicke, M. (1979). Helen Keller. Union-Verlag.

Chicago Style (17th ed.) Citation

Jaedicke, Martin. Helen Keller. Berlin: Union-Verlag, 1979.

MLA (8th ed.) Citation

Jaedicke, Martin. Helen Keller. Union-Verlag, 1979.

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