Kredit : Cikgu Adura Azlin Bin Ishak (Akaun Slideshare)
Guru Cemerlang Kimia
SM Sains Alam Shah, Kuala Lumpur
(Laman web : http://cikguadura.wordpress.com/ )
Guru Cemerlang Kimia
SM Sains Alam Shah, Kuala Lumpur
(Laman web : http://cikguadura.wordpress.com/ )
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