Bello, A. L., & Valientes, R. M. (2008). Grade inflation: Fact or myth? The Philippine Review of Economics.
Lua i Stíl Chicago (17ú heag.)Bello, Amelia L., agus Rodger M. Valientes. "Grade Inflation: Fact or Myth?" The Philippine Review of Economics 2008.
Lua MLA (9ú heag.)Bello, Amelia L., agus Rodger M. Valientes. "Grade Inflation: Fact or Myth?" The Philippine Review of Economics, 2008.
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