Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
芝加哥风格引文Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
MLA引文Perna. Preparing Today's Students for Tomorrow's Jobs in Metropolitan America. University of Pennsylvania Press.
警告：这些引文格式不一定是100％准确.