APA (7th ed.) Citation

Poitras, L., & Greenwald, G. (2015). Citizenfour. Britdoc.

Chicago Style (17th ed.) Citation

Poitras, Laura, and Glenn Greenwald. Citizenfour. [London]: Britdoc, 2015.

MLA (9th ed.) Citation

Poitras, Laura, and Glenn Greenwald. Citizenfour. Britdoc, 2015.

Warning: These citations may not always be 100% accurate.