Nipon Ketjoy และผู้แต่งคนอื่นๆ. (2007) Rural Electrification in the Mekong Countries with Photovoltaic Diesel Generator Hybrid Systems. <i>International Journal of Renewable Energy</i>, <i>Vol. 2</i>(No.1), pp 31-43.Nipon Ketjoy และผู้แต่งคนอื่นๆ. "Rural Electrification in the Mekong Countries with Photovoltaic Diesel Generator Hybrid Systems". International Journal of Renewable Energy Vol. 2 (2007):pp 31-43.Nipon Ketjoy และผู้แต่งคนอื่นๆ. Rural Electrification in the Mekong Countries with Photovoltaic Diesel Generator Hybrid Systems. School of Renewable Energy Technology:ม.ป.ท. 2007.