Marpaung, T. I. . “Students‟ Attitude Toward Extensive Reading Subject,A Case Study by Students of Teacher Training Faculty of HKBP Nommensen University Pematangsiantar”. Journal of English Teaching As a Foreign Language, vol. 1, no. 1, June 2015, pp. 45-52, https://ejournal.uhn.ac.id/index.php/jetafl/article/view/153.