APA Style
Jr, B, M., Carle, E. (1991).
Polar bear, polar bear, what do you hear? .
London, United Kingdom:
Puffin Books.
MLA Style
Jr, Bill, Martin., Carle, Eric.
"Polar bear, polar bear, what do you hear?".
London, United Kingdom:
Puffin Books,
1991.
Text.