APA (7th ed.) Citation

Charles, P. o. W., Juniper, T., & Skelly, I. (2010). Harmony: A new way of looking at our world. Harpercollins.

Chicago Style (17th ed.) Citation

Charles, Prince of Wales, Tony Juniper, and Ian Skelly. Harmony: A New Way of Looking at Our World. New York: Harpercollins, 2010.

MLA (9th ed.) Citation

Charles, Prince of Wales, et al. Harmony: A New Way of Looking at Our World. Harpercollins, 2010.