APA (7th ed.) Citation

Greengrass, P., Ackroyd, B., Pearson, R., & Powell, J. (2006). United 93. Universal Pictures.

Chicago Style (17th ed.) Citation

Greengrass, Paul, Barry Ackroyd, Richard Pearson, and John Powell. United 93. [United States]: Universal Pictures, 2006.

MLA (9th ed.) Citation

Greengrass, Paul, et al. United 93. Universal Pictures, 2006.