APA (7th ed.) Citation

Andersen, H. C., & Van Nutt, R. (1986). The ugly duckling. Knopf.

Chicago Style (17th ed.) Citation

Andersen, H. C., and Robert Van Nutt. The Ugly Duckling. New York: Knopf, 1986.

MLA (9th ed.) Citation

Andersen, H. C., and Robert Van Nutt. The Ugly Duckling. Knopf, 1986.

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