Wongduan Nakniyom และ Aroonsiri Shitangkoon. (2010) Determination of N -nitrosamine in cosmetics by headspace solid phase microextraction gas chromatography. Chulalongkorn University:ม.ป.ท.Wongduan Nakniyom และ Aroonsiri Shitangkoon. 2010. Determination of N -nitrosamine in cosmetics by headspace solid phase microextraction gas chromatography. ม.ป.ท.:Chulalongkorn University;Wongduan Nakniyom และ Aroonsiri Shitangkoon. Determination of N -nitrosamine in cosmetics by headspace solid phase microextraction gas chromatography. ม.ป.ท.:Chulalongkorn University, 2010. Print.