Prasetyaningsih, Y., Hendriyana, H. and Susanto, H. (2016) “Influence of Impregnation and Coprecipitation Method in Preparation of Cu/ZnO Catalyst for Methanol Synthesis”, Journal of Engineering and Technological Sciences, 48(4), pp. 442-450. doi: 10.5614/j.eng.technol.sci.2016.48.4.6.