Helbling, B. Archivmaterialien zu Barbara Helbling, 1931-2013.
Chicago Style (17th ed.) CitationHelbling, Barbara. Archivmaterialien Zu Barbara Helbling, 1931-2013.
MLA (9th ed.) CitationHelbling, Barbara. Archivmaterialien Zu Barbara Helbling, 1931-2013.
Warning: These citations may not always be 100% accurate.