APA (7th ed.) Citation

Keller, C. Archivmaterialien zu Christoph Keller, 1967-.

Chicago Style (17th ed.) Citation

Keller, Christoph. Archivmaterialien Zu Christoph Keller, 1967-.

MLA (9th ed.) Citation

Keller, Christoph. Archivmaterialien Zu Christoph Keller, 1967-.

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