APA (7th ed.) Citation

Keats, E. J. (1977). Whistle for Willie. Puffin Books.

Chicago Style (17th ed.) Citation

Keats, Ezra Jack. Whistle for Willie. (New York): Puffin Books, 1977.

MLA (9th ed.) Citation

Keats, Ezra Jack. Whistle for Willie. Puffin Books, 1977.

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