APA (7th ed.) Citation

Clark, C., Buchwald, D., MacIntyre, A., Sharpe, M., & Wessely, S. (2002). Chronic fatigue syndrome: A step towards agreement.

Chicago Style (17th ed.) Citation

Clark, C., D. Buchwald, A. MacIntyre, M. Sharpe, and S. Wessely. Chronic Fatigue Syndrome: A Step Towards Agreement. 2002.

MLA (9th ed.) Citation

Clark, C., et al. Chronic Fatigue Syndrome: A Step Towards Agreement. 2002.