APA (7th ed.) Citation

Helbich, W. J. Archivmaterialien zu Wolfgang J. Helbich, 1935-.

Chicago Style (17th ed.) Citation

Helbich, Wolfgang J. Archivmaterialien Zu Wolfgang J. Helbich, 1935-.

MLA (9th ed.) Citation

Helbich, Wolfgang J. Archivmaterialien Zu Wolfgang J. Helbich, 1935-.

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