Schecter, S. Listening tasks for intermediate students of american english. Teacher's manual and answer key (7a ed.).
芝加哥风格引文Schecter, Sandra. Listening Tasks for Intermediate Students of American English. Teacher's Manual and Answer Key. 7a ed.
MLA引文Schecter, Sandra. Listening Tasks for Intermediate Students of American English. Teacher's Manual and Answer Key. 7a ed.
警告：这些引文格式不一定是100％准确.