APA (7th ed.) Citation

Twentieth Century-Fox Film Corporation, Twentieth Century Fox Home Entertainment, Inc, Ford, J., Zanuck, D. F., Dunne, P., Pidgeon, W., . . . Llewellyn, R. (2007). How green was my valley. Twentieth Century Fox Home Entertainment.

Chicago Style (17th ed.) Citation

Twentieth Century-Fox Film Corporation, et al. How Green Was My Valley. Beverly Hills, Calif.: Twentieth Century Fox Home Entertainment, 2007.

MLA (9th ed.) Citation

Twentieth Century-Fox Film Corporation, et al. How Green Was My Valley. Twentieth Century Fox Home Entertainment, 2007.