Rafika Bayu Kusumandari, and Sukirman. “Organic Village As an Environmental Education Model Based Community for Early Childhood in Semarang City, Central Java, Indonesia”. Global Journal of Human-Social Science, vol. 17, no. H3, Mar. 2017, pp. 1-7, https://socialscienceresearch.org/index.php/GJHSS/article/view/2312.