Iqbal, Muhammad, Nora Ronita Dewi, and Masitowarni Siregar. 2020. “READABILITY OF READING TEXTS IN ENGLISH TEXTBOOKS FOR THE TWELFTH GRADE STUDENTS”. TRANSFORM : Journal of English Language Teaching and Learning 8 (2). North Sumatera, Indonesia. https://doi.org/10.24114/tj.v8i2.19654.