Roberto del Rosario: Pagkakaiba sa mga binago

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Linya 16:
 
==Sanggunian==
===Talababa===
{{reflist}}
===Bibliyograpiya===
*Bellis, Mary. ''[http://inventors.about.com/od/filipinoscientists/p/Karaoke.htm Roberto del Rosario - Filipino Inventor]''
*Doodsdpogi. [http://hubpages.com/tag/roberto+del+rosario/hot ''Famous Filipino Scientists and Inventors Part 3''] (...) "''Roberto del Rosario is Filipino Inventor and the president of the Trebel Music Corporation. He is the inventor of the Karaoke Sing-Along System, in 1975. The Karaoke Sing Along System is a Japanese expression...''" (...)