APA (7th ed.) Citation

Watt-Smith, T. (2015). The perfect diet for you? BBC Worldwide.

Chicago Style (17th ed.) Citation

Watt-Smith, Tom. The Perfect Diet for You? London, England: BBC Worldwide, 2015.

MLA (9th ed.) Citation

Watt-Smith, Tom. The Perfect Diet for You? BBC Worldwide, 2015.