APA (7th ed.) Citation

Prelutsky, J., & Hafner, M. (1981). It's Christmas. Greenwillow Books.

Chicago Style (17th ed.) Citation

Prelutsky, Jack, and Marylin Hafner. It's Christmas. New York: Greenwillow Books, 1981.

MLA (9th ed.) Citation

Prelutsky, Jack, and Marylin Hafner. It's Christmas. Greenwillow Books, 1981.