SISWOYO, M., G. KUSTYADJI, A. WIJAYANI, and W. HARTATI. “Competitive Advantage of Environmental Management and Green Innovation”. Utopía Y Praxis Latinoamericana, Vol. 25, no. 1, Nov. 2020, pp. 533-44, http://www.produccioncientifica.luz.edu.ve/index.php/utopia/article/view/34400.