APA (7th ed.) Citation

Cacioppo, J. T., & Patrick, W. (2008). Loneliness: Human nature and the need for social connection. W.W. Norton.

Chicago Style (17th ed.) Citation

Cacioppo, John T., and William Patrick. Loneliness: Human Nature and the Need for Social Connection. New York: W.W. Norton, 2008.

MLA (9th ed.) Citation

Cacioppo, John T., and William Patrick. Loneliness: Human Nature and the Need for Social Connection. W.W. Norton, 2008.