APA (7th ed.) Citation

Helfferich, K. (1921). Georg von Siemens. Springer.

Chicago Style (17th ed.) Citation

Helfferich, Karl. Georg Von Siemens. Berlin: Springer, 1921.

MLA (8th ed.) Citation

Helfferich, Karl. Georg Von Siemens. Springer, 1921.

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