ebrary, Inc, Ophuijsen, J. M. v., Raalte, M. v., & Stork, P. (2013). Protagoras of Abdera: The man, his measure. Brill.
芝加哥风格引文ebrary, Inc, J. M. van Ophuijsen, Marlein van Raalte, 与 Peter Stork. Protagoras of Abdera: The Man, His Measure. Leiden, Netherlands ; Boston, Mass.: Brill, 2013.
MLA引文ebrary, Inc, et al. Protagoras of Abdera: The Man, His Measure. Brill, 2013.
警告：这些引文格式不一定是100％准确.