APA সাইটেশন

Suárez Rivero, D. (2013). The enigma of Gottlob Frege. Four approaches of the theorists of the direct reference.

শিকাগো স্টাইলে সাইটেশন

Suárez Rivero, David. The Enigma of Gottlob Frege. Four Approaches of the Theorists of the Direct Reference. 2013.

এমএলএ সাইটেশন

Suárez Rivero, David. The Enigma of Gottlob Frege. Four Approaches of the Theorists of the Direct Reference. 2013.