APA (7th ed.) Citation

Gregg, C. H., Robertus, J. L., & Stone, J. B. (1989). The psychological aspects of chronic illness. Thomas.

Chicago Style (17th ed.) Citation

Gregg, Charles H., Judy L. Robertus, and J. Blair Stone. The Psychological Aspects of Chronic Illness. Springfield, Ill., U.S.A.: Thomas, 1989.

MLA (9th ed.) Citation

Gregg, Charles H., et al. The Psychological Aspects of Chronic Illness. Thomas, 1989.