APA (7th ed.) Citation

Open University, Films for the Humanities (Firm), & Cooper, C. (1996). A change of key? Films for the Humanities & Sciences.

Chicago Style (17th ed.) Citation

Open University, Films for the Humanities (Firm), and Charles Cooper. A Change of Key? Princeton, NJ: Films for the Humanities & Sciences, 1996.

MLA (9th ed.) Citation

Open University, et al. A Change of Key? Films for the Humanities & Sciences, 1996.