APA (7th ed.) Citation

Frowein, K. (1940). Festung Frankreich fiel. Limpert.

Chicago Style (17th ed.) Citation

Frowein, Kurt. Festung Frankreich Fiel. Berlin: Limpert, 1940.

MLA (8th ed.) Citation

Frowein, Kurt. Festung Frankreich Fiel. Limpert, 1940.

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