Trinidad, A. H. (1999). Concord drive in schools pushed. Philippine Daily Inquirer.
Chicago-čujuhus (17. p.)Trinidad, Andrea H. "Concord Drive in Schools Pushed." Philippine Daily Inquirer 1999.
MLA-čujuhus (9. p.)Trinidad, Andrea H. "Concord Drive in Schools Pushed." Philippine Daily Inquirer, 1999.
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