APA (7th ed.) Citation

Burns, M. (2010). As Easy as Pi: Picture Books Are Perfect for Teaching Math.

Chicago Style (17th ed.) Citation

Burns, Marilyn. As Easy as Pi: Picture Books Are Perfect for Teaching Math. 2010.

MLA (9th ed.) Citation

Burns, Marilyn. As Easy as Pi: Picture Books Are Perfect for Teaching Math. 2010.

Warning: These citations may not always be 100% accurate.