Portney, L. G., & Watkins, M. P. (1993). Foundations of clinical research: Applications to practice. Appleton & Lange.
Citazione stile Chigago Style (17a edizione)Portney, Leslie Gross, e Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Norwalk, Conn: Appleton & Lange, 1993.
Citatione MLA (9a ed.)Portney, Leslie Gross, e Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Appleton & Lange, 1993.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.