APA (7th ed.) Citation

Focus Features, This is That (Firm), Y Productions (Firm), Alliance Atlantis (Firm), González Iñárritu, A., Salerno, R., . . . Watts, N. (2011). 21 grams =: 21 grammes ([English/French dialogue version].). Alliance Vivafilm.

Chicago Style (17th ed.) Citation

Focus Features, et al. 21 Grams =: 21 Grammes. [English/French dialogue version]. Montréal: Alliance Vivafilm, 2011.

MLA (9th ed.) Citation

Focus Features, et al. 21 Grams =: 21 Grammes. [English/French dialogue version]. Alliance Vivafilm, 2011.