Sianipar, D. R., S. W. P. Lubis, V. C. Limbong, D. S. Sianturi, and S. N. Tarigan. “CONTENT OF READING MATERIAL ON THE EIGHTH GRADE STUDENTS’ TEXTBOOK”. Jurnal Bahasa Indonesia Prima (BIP), vol. 2, no. 1, Mar. 2020, pp. 76-84, doi:10.34012/bip.v2i1.884.