Cita APA (7th ed.)

Frege, G. (1980). Philosophical and mathematical correspondence. The University of Chicago.

Cita Chicago (17th ed.)

Frege, Gottlob. Philosophical and Mathematical Correspondence. Chicago: The University of Chicago, 1980.

Cita MLA (9th ed.)

Frege, Gottlob. Philosophical and Mathematical Correspondence. The University of Chicago, 1980.