APA (7th ed.) Citation

Ullmann, L., & Nunnally, T. (1999). Before you sleep. Viking.

Chicago Style (17th ed.) Citation

Ullmann, Linn, and Tiina Nunnally. Before You Sleep. New York: Viking, 1999.

MLA (9th ed.) Citation

Ullmann, Linn, and Tiina Nunnally. Before You Sleep. Viking, 1999.

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