APA (7th ed.) Citation

Janssen, K. Archivmaterialien zu Karl Janssen, 1912-1984.

Chicago Style (17th ed.) Citation

Janssen, Karl. Archivmaterialien Zu Karl Janssen, 1912-1984.

MLA (9th ed.) Citation

Janssen, Karl. Archivmaterialien Zu Karl Janssen, 1912-1984.

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