APA (7th ed.) Citation

Giff, P. R., & Natti, S. (1988). Happy birthday, Ronald Morgan! Puffin Books.

Chicago Style (17th ed.) Citation

Giff, Patricia Reilly, and Susanna Natti. Happy Birthday, Ronald Morgan! New York, N.Y., U.S.A.: Puffin Books, 1988.

MLA (9th ed.) Citation

Giff, Patricia Reilly, and Susanna Natti. Happy Birthday, Ronald Morgan! Puffin Books, 1988.