APA-referens (7:e uppl.)

Portney, L. G., & Watkins, M. P. (1993). Foundations of clinical research: Applications to practice. Appleton & Lange.

Chicago-referens (17:e uppl.)

Portney, Leslie Gross, och Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Norwalk, Conn: Appleton & Lange, 1993.

MLA-referens (9:e uppl.)

Portney, Leslie Gross, och Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Appleton & Lange, 1993.