Watkins, K. W. (1998). Student study guide to accompany Chang chemistry (6th ed.). WCB.
芝加哥风格引文Watkins, Kenneth W. Student Study Guide to Accompany Chang Chemistry. 6th ed. Boston: WCB, 1998.
MLA引文Watkins, Kenneth W. Student Study Guide to Accompany Chang Chemistry. 6th ed. WCB, 1998.
警告：这些引文格式不一定是100％准确.