Prasetyaningsih, Yusi, Hendriyana Hendriyana, and Herri Susanto. 2016. “Influence of Impregnation and Coprecipitation Method in Preparation of Cu/ZnO Catalyst for Methanol Synthesis”. Journal of Engineering and Technological Sciences 48 (4):442-50. https://doi.org/10.5614/j.eng.technol.sci.2016.48.4.6.