APA (7th ed.) Citation

Carle, E. (1987). 1,2,3 to the zoo: A counting book. Puffin Books.

Chicago Style (17th ed.) Citation

Carle, Eric. 1,2,3 to the Zoo: A Counting Book. London: Puffin Books, 1987.

MLA (9th ed.) Citation

Carle, Eric. 1,2,3 to the Zoo: A Counting Book. Puffin Books, 1987.