APA (7th ed.) Citation

Jaedicke, M., & Keller, H. (1982). Helen Keller (2. Aufl.). Union-Verlag.

Chicago Style (17th ed.) Citation

Jaedicke, Martin, and Helen Keller. Helen Keller. 2. Aufl. Berlin: Union-Verlag, 1982.

MLA (8th ed.) Citation

Jaedicke, Martin, and Helen Keller. Helen Keller. 2. Aufl. Union-Verlag, 1982.

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