APA (7th ed.) Citation

McGowan, M., Williams, P., & Williams, R. (2012). Christmas Day. Electric Sky.

Chicago Style (17th ed.) Citation

McGowan, Mark, Peter Williams, and Rowan Williams. Christmas Day. Brighton, England: Electric Sky, 2012.

MLA (9th ed.) Citation

McGowan, Mark, et al. Christmas Day. Electric Sky, 2012.