Yap. C. K. และผู้แต่งคนอื่นๆ. (2011) Assessment Cu, Ni and Zn Pollution in the Surface Sediments in the Southern Peninsular Malaysia using Cluster Analysis, Ratios of Geochemical Nonresistant to Resistant Fractions, and Geochemical Indices. <i>EnvironmentAsia</i>, <i>4</i>(1), p53-61.Yap. C. K. และผู้แต่งคนอื่นๆ. "Assessment Cu, Ni and Zn Pollution in the Surface Sediments in the Southern Peninsular Malaysia using Cluster Analysis, Ratios of Geochemical Nonresistant to Resistant Fractions, and Geochemical Indices". EnvironmentAsia 4 (2011):p53-61.Yap. C. K. และผู้แต่งคนอื่นๆ. Assessment Cu, Ni and Zn Pollution in the Surface Sediments in the Southern Peninsular Malaysia using Cluster Analysis, Ratios of Geochemical Nonresistant to Resistant Fractions, and Geochemical Indices. Thai Society of Higher Education Institutes on Environment:ม.ป.ท. 2011.