APA Style

Jr., B, M., Carle, E. (1997). Polar bear, polar bear, what do you hear? . New York: Henry Holt and Co. (BYR).

MLA Style

Jr., Bill, Martin., Carle, Eric. "Polar bear, polar bear, what do you hear?". New York: Henry Holt and Co. (BYR), 1997. Text.