Warangkhana Khaodee และ Wanlapa Aeungmaitrepirom. (2013) Development of sorbent modified with cyanidin from red cabbage extract for naked-eye determination of heavy metal ions. Chulalongkorn University.:ม.ป.ท.Warangkhana Khaodee และ Wanlapa Aeungmaitrepirom. 2013. Development of sorbent modified with cyanidin from red cabbage extract for naked-eye determination of heavy metal ions. ม.ป.ท.:Chulalongkorn University.;Warangkhana Khaodee และ Wanlapa Aeungmaitrepirom. Development of sorbent modified with cyanidin from red cabbage extract for naked-eye determination of heavy metal ions. ม.ป.ท.:Chulalongkorn University. 2013. Print.