APA (7th ed.) Citation

Twentieth Century Fox Home Entertainment, Inc, Pidgeon, W., O'Hara, M., McDowall, R., Lee, A., Ford, J., . . . Llewellyn, R. (2013). How green was my valley. Twentieth Century Fox Home Entertainment.

Chicago Style (17th ed.) Citation

Twentieth Century Fox Home Entertainment, Inc, Walter Pidgeon, Maureen O'Hara, Roddy McDowall, Anna Lee, John Ford, Darryl Francis Zanuck, Philip Dunne, and Richard Llewellyn. How Green Was My Valley. [United States]: Twentieth Century Fox Home Entertainment, 2013.

MLA (9th ed.) Citation

Twentieth Century Fox Home Entertainment, Inc, et al. How Green Was My Valley. Twentieth Century Fox Home Entertainment, 2013.