APA (7th ed.) Citation

Sigel, F. (1919). The spirit of America. American Friends of German Democracy.

Chicago Style (17th ed.) Citation

Sigel, Franz. The Spirit of America. New York, N.Y.: American Friends of German Democracy, 1919.

MLA (9th ed.) Citation

Sigel, Franz. The Spirit of America. American Friends of German Democracy, 1919.

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