APA (7th ed.) Citation

British Film Institute, Great Britain. Post Office. Film Unit, Jennings, H., Watt, H., & Cavalcanti, A. (2009). If war should come: The GPO Film Unit Collection volume 3. The British Flm Institute.

Chicago Style (17th ed.) Citation

British Film Institute, Great Britain. Post Office. Film Unit, Humphrey Jennings, Harry Watt, and Alberto Cavalcanti. If War Should Come: The GPO Film Unit Collection Volume 3. [London]: The British Flm Institute, 2009.

MLA (9th ed.) Citation

British Film Institute, et al. If War Should Come: The GPO Film Unit Collection Volume 3. The British Flm Institute, 2009.