Cita APA (7th ed.)

Frege, G. (1980). The foundations of arithmetic: A logico-mathematical enquiry into the concept of number (2nd rev. ed.). Northwestern University Press.

Cita Chicago (17th ed.)

Frege, Gottlob. The Foundations of Arithmetic: A Logico-mathematical Enquiry into the Concept of Number. 2nd rev. ed. Evanston, Ill: Northwestern University Press, 1980.

Cita MLA (9th ed.)

Frege, Gottlob. The Foundations of Arithmetic: A Logico-mathematical Enquiry into the Concept of Number. 2nd rev. ed. Northwestern University Press, 1980.