APA (7th ed.) Citation

Jentsch, G. (1940). How Britain went to war: August, September 1939. German Institute of Internat. Research.

Chicago Style (17th ed.) Citation

Jentsch, Gerhart. How Britain Went to War: August, September 1939. Berlin: German Institute of Internat. Research, 1940.

MLA (8th ed.) Citation

Jentsch, Gerhart. How Britain Went to War: August, September 1939. German Institute of Internat. Research, 1940.