Portney, L. G., & Watkins, M. P. (1993). Foundations of clinical research: Applications to practice. Appleton & Lange.
芝加哥风格引文Portney, Leslie Gross, 与 Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Norwalk, Conn: Appleton & Lange, 1993.
MLA引文Portney, Leslie Gross, 与 Mary P. Watkins. Foundations of Clinical Research: Applications to Practice. Appleton & Lange, 1993.
警告：这些引文格式不一定是100％准确.