APA (7th ed.) Citation

Helfferich, K. Archivmaterialien zu Karl Helfferich, 1872-1924.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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