APA (7th ed.) Citation

Scott, K., & Mackintosh, S. (2012). How big is the universe? BBC.

Chicago Style (17th ed.) Citation

Scott, Kenny, and Steven Mackintosh. How Big Is the Universe? [London, England]: BBC, 2012.

MLA (9th ed.) Citation

Scott, Kenny, and Steven Mackintosh. How Big Is the Universe? BBC, 2012.