Estupigan, R. (1999). Putting premium on quality tertiary education. Manila Bulletin.
Cita Chicago (17th ed.)Estupigan, Ruth. "Putting Premium on Quality Tertiary Education." Manila Bulletin 1999.
Cita MLA (9th ed.)Estupigan, Ruth. "Putting Premium on Quality Tertiary Education." Manila Bulletin, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.