APA Style

Pfeffer, W., Keller, H. (1999). Sounds All Around: Let's- Read- And- Find- Out- Science, Stage 1 . New York: HarperCollins Publishers.

MLA Style

Pfeffer, Wendy., Keller, Holly. "Sounds All Around: Let's- Read- And- Find- Out- Science, Stage 1". New York: HarperCollins Publishers, 1999. Text.