JOSHUA, S. (2016). TUNE INTO GRAMMAR - FINE TUNE YOUR LANGUAGE - CLASS 4. PEARSON.
芝加哥风格引文JOSHUA, SWARNA. TUNE INTO GRAMMAR - FINE TUNE YOUR LANGUAGE - CLASS 4. NEW DELHI: PEARSON, 2016.
MLA引文JOSHUA, SWARNA. TUNE INTO GRAMMAR - FINE TUNE YOUR LANGUAGE - CLASS 4. PEARSON, 2016.
警告：这些引文格式不一定是100％准确.