APA (7th ed.) Citation

Ziefert, H., Bolam, E., & Andersen, H. C. (1997). The ugly duckling. Viking.

Chicago Style (17th ed.) Citation

Ziefert, Harriet, Emily Bolam, and H. C. Andersen. The Ugly Duckling. New York: Viking, 1997.

MLA (8th ed.) Citation

Ziefert, Harriet, et al. The Ugly Duckling. Viking, 1997.

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