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 (Mar. 2024), 25–35. DOI:https://doi.org/10.18488/13.v13i1.3682.