APA (7th ed.) Citation

Keats, E. J. (1996). Sílbale a Willie. Puffin Books.

Chicago Style (17th ed.) Citation

Keats, Ezra Jack. Sílbale a Willie. New York, N.Y., U.S.A.: Puffin Books, 1996.

MLA (9th ed.) Citation

Keats, Ezra Jack. Sílbale a Willie. Puffin Books, 1996.