APA (7th ed.) Citation

Helfferich, K. (2019). Archivmaterialien zu Karl Helfferich, 1872-1924.

Chicago Style (17th ed.) Citation

Helfferich, Karl. Archivmaterialien Zu Karl Helfferich, 1872-1924. 2019.

MLA (8th ed.) Citation

Helfferich, Karl. Archivmaterialien Zu Karl Helfferich, 1872-1924. 2019.

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