Gaya APA

Cale_Eric, ., Jr_Bill, M. (2010). Polar Bear, Polar Bear, What Do You Hear? . New York: Bill Martin Jr & Eric Cale.

Gaya MLA

Cale_Eric, ., Jr_Bill, Martin. "Polar Bear, Polar Bear, What Do You Hear?". New York: Bill Martin Jr & Eric Cale, 2010. Picture Book.