APA (7th ed.) Citation

Ridder, P. Archivmaterialien zu Paul Ridder, 1942-.

Chicago Style (17th ed.) Citation

Ridder, Paul. Archivmaterialien Zu Paul Ridder, 1942-.

MLA (9th ed.) Citation

Ridder, Paul. Archivmaterialien Zu Paul Ridder, 1942-.

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