APA (7th ed.) Citation

Cooper, A. F. (1992). The Air battle of the Ruhr: RAF offensive March to July 1943 (1. publ.). Airlife Publ.

Chicago Style (17th ed.) Citation

Cooper, Alan F. The Air Battle of the Ruhr: RAF Offensive March to July 1943. 1. publ. Shrewsbury: Airlife Publ, 1992.

MLA (9th ed.) Citation

Cooper, Alan F. The Air Battle of the Ruhr: RAF Offensive March to July 1943. 1. publ. Airlife Publ, 1992.

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