APA (7th ed.) Citation

Gropper, W. Archivmaterialien zu William Gropper, 1897-1977.

Chicago Style (17th ed.) Citation

Gropper, William. Archivmaterialien Zu William Gropper, 1897-1977.

MLA (9th ed.) Citation

Gropper, William. Archivmaterialien Zu William Gropper, 1897-1977.

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