(2001). RP software piracy goes down to only 61 percent. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)"RP Software Piracy Goes Down to Only 61 Percent." Manila Bulletin 2001.
Lua MLA (9ú heag.)"RP Software Piracy Goes Down to Only 61 Percent." Manila Bulletin, 2001.
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