Cita APA (7th ed.)
Thurston, H. (1956). The number system (1a.ed.). Dover publications.
Cita Chicago (17th ed.)
Thurston, H.A. The Number System. 1a.ed. Dover publications, 1956.
Cita MLA (9th ed.)
Thurston, H.A. The Number System. 1a.ed. Dover publications, 1956.
Atenció: Aquestes cites poden no estar 100% correctes.