APA (7th ed.) Citation

Gutschow, N. (1990). Hamburg: The "catastrophe" of July 1943.

Chicago Style (17th ed.) Citation

Gutschow, Niels. Hamburg: The "Catastrophe" of July 1943. 1990.

MLA (9th ed.) Citation

Gutschow, Niels. Hamburg: The "Catastrophe" of July 1943. 1990.

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