Cita APA (7th ed.)
ebrary, Inc, & Schirn, M. (1996). Frege: Importance and legacy. Walter de Gruyter.
Cita Chicago (17th ed.)
ebrary, Inc, i Matthias Schirn. Frege: Importance and Legacy. Berlin ; New York: Walter de Gruyter, 1996.
Cita MLA (9th ed.)
ebrary, Inc, i Matthias Schirn. Frege: Importance and Legacy. Walter de Gruyter, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.