Cagahastian, D. C. (2002). Liban stresses R & D, praises Filipino inventors. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Cagahastian, Diego C. "Liban Stresses R & D, Praises Filipino Inventors." Manila Bulletin 2002.
Lua MLA (9ú heag.)Cagahastian, Diego C. "Liban Stresses R & D, Praises Filipino Inventors." Manila Bulletin, 2002.
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