HERIYANTO, H., D. SATORI, A. KOMARIAH, and A. SURYANA. “Character Education In The Era Of Industrial Revolution 4.0 And Its Relevance To The High School Learning Transformation Process”. Utopía Y Praxis Latinoamericana, Vol. 24, no. 1, Dec. 2019, pp. 327-40, http://www.produccioncientifica.luz.edu.ve/index.php/utopia/article/view/29966.