Levine, G. C., Elliott, M., & Andersen, H. C. (1999). The princess test. HarperCollinsPublishers.
Chicago Style (17th ed.) CitationLevine, Gail Carson, Mark Elliott, and H. C. Andersen. The Princess Test. New York: HarperCollinsPublishers, 1999.
MLA (8th ed.) CitationLevine, Gail Carson, et al. The Princess Test. HarperCollinsPublishers, 1999.
Warning: These citations may not always be 100% accurate.