APA (7th ed.) Citation

Electric Sky (Firm), Tyson, C., & Gilhooly, R. (2013). Fat doctor. Electric Sky.

Chicago Style (17th ed.) Citation

Electric Sky (Firm), Cathy Tyson, and Rebecca Gilhooly. Fat Doctor. London, England: Electric Sky, 2013.

MLA (9th ed.) Citation

Electric Sky (Firm), et al. Fat Doctor. Electric Sky, 2013.