APA

Frege (Gottlob), . (1980). Philosophical And Mathematical Correspondence. : .

Chicago

Frege (Gottlob), . 1980. Philosophical And Mathematical Correspondence. : .

Harvard

Frege (Gottlob), . (1980). Philosophical And Mathematical Correspondence. : .

MLA

Frege (Gottlob), . Philosophical And Mathematical Correspondence. : . 1980.