Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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