APA (7th ed.) Citation

Blaschke, W. (1949). Kreis und Kugel. CheLsea.

Chicago Style (17th ed.) Citation

Blaschke, Wilhelm. Kreis Und Kugel. New York: CheLsea, 1949.

MLA (8th ed.) Citation

Blaschke, Wilhelm. Kreis Und Kugel. CheLsea, 1949.

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