APA (7th ed.) Citation

Sturges, P., & Marzo, B. (2007). How do you make a baby smile? HarperCollins.

Chicago Style (17th ed.) Citation

Sturges, Philemon, and Bridget Marzo. How Do You Make a Baby Smile? New York: HarperCollins, 2007.

MLA (8th ed.) Citation

Sturges, Philemon, and Bridget Marzo. How Do You Make a Baby Smile? HarperCollins, 2007.

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