APA (7th ed.) Citation

Keller, E. Archivmaterialien zu Erwin Keller, 1907-1991.

Chicago Style (17th ed.) Citation

Keller, Erwin. Archivmaterialien Zu Erwin Keller, 1907-1991.

MLA (9th ed.) Citation

Keller, Erwin. Archivmaterialien Zu Erwin Keller, 1907-1991.

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