Astin, A. W. (1977). Four critical years. Jossey-Bass Publishers.
芝加哥风格引文Astin, Alexander W. Four Critical Years. San Francisco: Jossey-Bass Publishers, 1977.
MLA引文Astin, Alexander W. Four Critical Years. Jossey-Bass Publishers, 1977.
警告：这些引文格式不一定是100％准确.