Ong, B. S. (2005). Mathematics for matriculation semester 1. Penerbit Fajar Bakti.
Lua i Stíl Chicago (17ú heag.)Ong, Beng Sim. Mathematics for Matriculation Semester 1. Shah Alam, Selangor Darul Ehsan: Penerbit Fajar Bakti, 2005.
Lua MLA (8ú heag.)Ong, Beng Sim. Mathematics for Matriculation Semester 1. Penerbit Fajar Bakti, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.