POWELL, S. (1999). Returning to study: A guide for professionals. Open University Press.
芝加哥风格引文POWELL, Stuart. Returning to Study: A Guide for Professionals. Open University Press, 1999.
MLA引文POWELL, Stuart. Returning to Study: A Guide for Professionals. Open University Press, 1999.
警告：这些引文格式不一定是100％准确.