APA (7th ed.) Citation

BBC Worldwide Ltd., Films for the Humanities & Sciences (Firm), & Infobase. (2005). How they sell. Infobase.

Chicago Style (17th ed.) Citation

BBC Worldwide Ltd., Films for the Humanities & Sciences (Firm), and Infobase. How They Sell. New York, N.Y.: Infobase, 2005.

MLA (8th ed.) Citation

BBC Worldwide Ltd., et al. How They Sell. Infobase, 2005.