Grassian, V. (1984). Perennial philosophical issues. Prentice hall.
芝加哥风格引文Grassian, Victor. Perennial Philosophical Issues. New Jersey: Prentice hall, 1984.
MLA引文Grassian, Victor. Perennial Philosophical Issues. Prentice hall, 1984.
警告：这些引文格式不一定是100％准确.