MEHROTRA C M. (2001). DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. SAGE PUBLICATIONS.
芝加哥风格引文MEHROTRA C M. DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. LONDON: SAGE PUBLICATIONS, 2001.
MLA引文MEHROTRA C M. DISTANCE LEARNING: PRINCIPLE FOR EFFECTIVE EVALUTION. SAGE PUBLICATIONS, 2001.
警告：这些引文格式不一定是100％准确.