APA (7th ed.) Citation

Helm, R. (2019). Nachlass von Rudolf Helm, 1872-1966.

Chicago Style (17th ed.) Citation

Helm, Rudolf. Nachlass Von Rudolf Helm, 1872-1966. 2019.

MLA (9th ed.) Citation

Helm, Rudolf. Nachlass Von Rudolf Helm, 1872-1966. 2019.

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