APA (7th ed.) Citation

Helwig, P. Archivmaterialien zu Paul Helwig, 1893-1963.

Chicago Style (17th ed.) Citation

Helwig, Paul. Archivmaterialien Zu Paul Helwig, 1893-1963.

MLA (9th ed.) Citation

Helwig, Paul. Archivmaterialien Zu Paul Helwig, 1893-1963.

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