APA (7th ed.) Citation

Köster, F. (1915). secrets of german progress. The Fatherland Corp.

Chicago Style (17th ed.) Citation

Köster, Frank. Secrets of German Progress. New York: The Fatherland Corp, 1915.

MLA (9th ed.) Citation

Köster, Frank. Secrets of German Progress. The Fatherland Corp, 1915.

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