TOLKIEN, J. (2001). THE TWO TOWERS (1st.). HARPER COLLINS PUBLISHERS.
芝加哥风格引文TOLKIEN, J.R.R. THE TWO TOWERS. 1st. LONDON: HARPER COLLINS PUBLISHERS, 2001.
MLA引文TOLKIEN, J.R.R. THE TWO TOWERS. 1st. HARPER COLLINS PUBLISHERS, 2001.
警告：这些引文格式不一定是100％准确.