APA-viite (7. p.)

Fletcher, G. S., & Preceded by: Fletcher, R. H. (2021). Clinical epidemiology: The essentials (Sixth edition.). Wolters Kluwer.

Chicago-viite (17. p.)

Fletcher, Grant S., ja Robert H. Preceded by: Fletcher. Clinical Epidemiology: The Essentials. Sixth edition. Philadelphia: Wolters Kluwer, 2021.

MLA-viite (9. p.)

Fletcher, Grant S., ja Robert H. Preceded by: Fletcher. Clinical Epidemiology: The Essentials. Sixth edition. Wolters Kluwer, 2021.