Barker, D. B. (1976). Practical epidemiology (2nd.). Churchill livingstone.
芝加哥风格引文Barker, D.J.P. Bennett. Practical Epidemiology. 2nd. Singapore: Churchill livingstone, 1976.
MLA引文Barker, D.J.P. Bennett. Practical Epidemiology. 2nd. Churchill livingstone, 1976.
警告：这些引文格式不一定是100％准确.