APA (7th ed.) Citation

Schulpe, G. v., & Zettel, K. Nachlass von Karl Zettel (1831-1904) – BSB Zetteliana.

Chicago Style (17th ed.) Citation

Schulpe, Georg von, and Karl Zettel. Nachlass Von Karl Zettel (1831-1904) – BSB Zetteliana.

MLA (9th ed.) Citation

Schulpe, Georg von, and Karl Zettel. Nachlass Von Karl Zettel (1831-1904) – BSB Zetteliana.

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