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.