APA (7th ed.) Citation

Wessely, S., Hotopf, M., & Sharpe, M. (1998). Chronic fatigue and its syndromes. University Press.

Chicago Style (17th ed.) Citation

Wessely, Simon, Matthew Hotopf, and Michael Sharpe. Chronic Fatigue and Its Syndromes. Oxford [etc.]: University Press, 1998.

MLA (9th ed.) Citation

Wessely, Simon, et al. Chronic Fatigue and Its Syndromes. University Press, 1998.