APA (7th ed.) Citation

Kopper, L. (1996). I'm a baby, you're a baby. Puffin Books.

Chicago Style (17th ed.) Citation

Kopper, Lisa. I'm a Baby, You're a Baby. London [u.a.]: Puffin Books, 1996.

MLA (9th ed.) Citation

Kopper, Lisa. I'm a Baby, You're a Baby. Puffin Books, 1996.