APA (7th ed.) Citation

Steinitz, A. (2010). Horizon: A Horizon guide. BBC Worldwide.

Chicago Style (17th ed.) Citation

Steinitz, Alex. Horizon: A Horizon Guide. London, England: BBC Worldwide, 2010.

MLA (9th ed.) Citation

Steinitz, Alex. Horizon: A Horizon Guide. BBC Worldwide, 2010.