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Lua i Stíl Chicago (17ú heag.)Pulido, Paz N. Pag-unlad at Pagbabago = Development and Progress Socio-economic Problems. Manila: Phil. Book Co, 1980.
Lua MLA (9ú heag.)Pulido, Paz N. Pag-unlad at Pagbabago = Development and Progress Socio-economic Problems. Phil. Book Co, 1980.
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