APA (7th ed.) Citation

Willis, E. (1999). Don't think, smile!: Notes on a decade of denial. Beacon Press.

Chicago Style (17th ed.) Citation

Willis, Ellen. Don't Think, Smile!: Notes on a Decade of Denial. Boston, Mass.: Beacon Press, 1999.

MLA (9th ed.) Citation

Willis, Ellen. Don't Think, Smile!: Notes on a Decade of Denial. Beacon Press, 1999.