Van Fleteren, F. (1999). Porphyry. Augustine through the ages, 661-663.
芝加哥风格引文Van Fleteren, Frederick. "Porphyry." Augustine Through the Ages 1999: 661-663.
MLA引文Van Fleteren, Frederick. "Porphyry." Augustine Through the Ages, 1999, pp. 661-663.
警告：这些引文格式不一定是100％准确.