Lopez, E. H. (2002). Local software piracy rate drops to 61 percent. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Lopez, Edu H. "Local Software Piracy Rate Drops to 61 Percent." Manila Bulletin 2002.
Lua MLA (9ú heag.)Lopez, Edu H. "Local Software Piracy Rate Drops to 61 Percent." Manila Bulletin, 2002.
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