APA (7th ed.) Citation

Poitras, L. Citizenfour a film by Laura Poitras.

Chicago Style (17th ed.) Citation

Poitras, Laura. Citizenfour a Film by Laura Poitras.

MLA (9th ed.) Citation

Poitras, Laura. Citizenfour a Film by Laura Poitras.

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