APA (7th ed.) Citation

Westerhof, N. (2011). Tale of two circulations. Lightcurve Films.

Chicago Style (17th ed.) Citation

Westerhof, N. Tale of Two Circulations. Lisbon: Lightcurve Films, 2011.

MLA (9th ed.) Citation

Westerhof, N. Tale of Two Circulations. Lightcurve Films, 2011.

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