Mohd Saudi, A.S., Abdullah, A., Shafii, N.Z., Khairuddin, M.Z.F., Ismail, M.F., Mejía, P.A.C., Kadir, K.A., Saudi, M.M., Kamarudin, M.K.A., Muhammad-Sukki, F., Ali, M.H., Bani, N.A., "Assessment of Ambient Air Quality in Hulu Langat District, Selangor, Malaysia", ,