Sagot :
1. "Sillicon" (2007). The Encyclopedia Brittanica. 20, 118-132.
2. Silicon, (2010, March 6). Www.science/universityofeucla.edu
3. Settleberg, J. (2004). The Many Uses of Silicon Chicago Braxton. Publishers, Inc.
4. Helms, R(1995 ed. ) "Electric Light", World Book Encyclopedia.
5. Villanueva, A. 2020, Feb 28. DENR leads "tayo and kalikasan" campaign - manila standard 8:12.