APA (7th ed.) Citation

Fletcher, R. H., Fletcher, S. W., & Wagner, E. H. (1982). Clinical epidemiology: The essentials. Williams & Wilkins.

Chicago Style (17th ed.) Citation

Fletcher, Robert H., Suzanne W. Fletcher, and Edward H. Wagner. Clinical Epidemiology: The Essentials. Baltimore: Williams & Wilkins, 1982.

MLA (9th ed.) Citation

Fletcher, Robert H., et al. Clinical Epidemiology: The Essentials. Williams & Wilkins, 1982.