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Lua i Stíl Chicago (17ú heag.)Espiritu, Socorro C. Social Isues and Problems: Their Implications to Philippine National Development. Quezon City: Katha Pub, 1987.
Lua MLA (9ú heag.)Espiritu, Socorro C. Social Isues and Problems: Their Implications to Philippine National Development. Katha Pub, 1987.
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