Plotinus, Mackenna, S., & Page, B. S. (2001). The six Enneads. Virginia Tech.
芝加哥风格引文Plotinus, Stephen Mackenna, 与 B. S. Page. The Six Enneads. Blacksburg, VA: Virginia Tech, 2001.
MLA引文Plotinus, et al. The Six Enneads. Virginia Tech, 2001.
警告：这些引文格式不一定是100％准确.