SUHARTONO, and SUHARTONO. “THE UTILIZATION OF TEXTBOOKS FOR TEACHING ENGLISH TO THE FIRST GRADE OF ELEMENTARY SCHOOL IN SDN 2 TANJUNG, KEDAMEAN, GRESIK”. RETAIN : Journal of Research in English Language Teaching, Vol. 2, no. 3, July 2014, https://ejournal.unesa.ac.id/index.php/retain/article/view/8480.