Sitti Rahmatia Yasin Hilumalo, Abdul Rahmat, and Rusmin Husain. “LANGUAGE AS A MEANS OF SCIENTIFIC THINKING IN LEARNING INDONESIAN THROUGH GROUP INVESTIGATION METHODS IN THE FOURTH GRADE OF THE TIBAWA 13 PUBLIC ELEMENTARY SCHOOL”. European Journal of Humanities and Educational Advancements, vol. 2, no. 11, Nov. 2021, pp. 122-4, https://scholarzest.com/index.php/ejhea/article/view/1472.