Fahrurrozi, Sehati Kaban, Ratna Sari Dewi, Reza Rachmadtullah, Prayuningtyas Angger Wardhani , Uswatun Hasanah. 2020. “Developing the Instrument of Pre-Writing Skill to the First Grade Students of Elementary School”. International Journal of Advanced Science and Technology 29 (06), 1932 -40. http://sersc.org/journals/index.php/IJAST/article/view/12898.