APA (7th ed.) Citation

Hill, E. (1996). What's inside?: A lift-the-flap book. Puffin Books.

Chicago Style (17th ed.) Citation

Hill, Eric. What's Inside?: A Lift-the-flap Book. London [u.a.]: Puffin Books, 1996.

MLA (9th ed.) Citation

Hill, Eric. What's Inside?: A Lift-the-flap Book. Puffin Books, 1996.