Sumarni, S., W. D. Andika, F. Utami, M. Rantina, Y. Sazaki, R. T. Astika, B. Rahardja, N. Kurnia, N. Priyanti, and R. Wondal. “Development Of ICT- Based Early Childhood Concept Teaching Book To Increase Pedagogic Competence For College Students Of PGPAUD”. Opción, Vol. 35, Oct. 2019, pp. 1332-50, https://produccioncientifica.luz.edu.ve/index.php/opcion/article/view/32465.