Azhar, N., Yap, C. K. ., Nulit, R. ., Omar, H. ., Syazwan, W. M. and Leow, C. S. . (2024) “A preliminary study of direct observation and selected water quality monitoring in Putrajaya Lake: the status between October-December 2022”, International Journal of Sustainable Energy and Environmental Research, 13(1), pp. 25–35. doi: 10.18488/13.v13i1.3682.