Ritchie, M., & Mack, J. A. (1974). Police warnings. University of Glasgow.
芝加哥风格引文Ritchie, Margaret, 与 John A. Mack. Police Warnings. Glasgow: University of Glasgow, 1974.
MLA引文Ritchie, Margaret, 与 John A. Mack. Police Warnings. University of Glasgow, 1974.
警告：这些引文格式不一定是100％准确.