ebrary, Inc, & Schirn, M. (1996). Frege: Importance and legacy. Walter de Gruyter.
芝加哥风格引文ebrary, Inc, 与 Matthias Schirn. Frege: Importance and Legacy. Berlin ; New York: Walter de Gruyter, 1996.
MLA引文ebrary, Inc, 与 Matthias Schirn. Frege: Importance and Legacy. Walter de Gruyter, 1996.
警告：这些引文格式不一定是100％准确.