APA (7th ed.) Citation

O'Ryan, R., & Jack, C. (2013). A green Christmas! (First edition.). Little Simon.

Chicago Style (17th ed.) Citation

O'Ryan, Ray, and Colin Jack. A Green Christmas! First edition. New York: Little Simon, 2013.

MLA (8th ed.) Citation

O'Ryan, Ray, and Colin Jack. A Green Christmas! First edition. Little Simon, 2013.

Warning: These citations may not always be 100% accurate.