Sing Y P. (2010). Business Mathamatics.
Cita Chicago (17th ed.)Sing Y P. Business Mathamatics. [s.l], 2010.
Cita MLA (9th ed.)Sing Y P. Business Mathamatics. 2010.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)