APA (7th ed.) Citation

Sturgeon, T., & Williams, P. (1999). Baby is three. North Atlantic Books.

Chicago Style (17th ed.) Citation

Sturgeon, Theodore, and Paul Williams. Baby Is Three. Berkeley, Calif.: North Atlantic Books, 1999.

MLA (8th ed.) Citation

Sturgeon, Theodore, and Paul Williams. Baby Is Three. North Atlantic Books, 1999.