APA (7th ed.) Citation

Shell (Firm), Spottiswoode, R., & Orrom, M. The two-stroke engine.

Chicago Style (17th ed.) Citation

Shell (Firm), Raymond Spottiswoode, and Michael Orrom. The Two-stroke Engine. A Shell Film.

MLA (9th ed.) Citation

Shell (Firm), et al. The Two-stroke Engine.