Hanif, H. Irawati, dan Rosdiana. “The Significant of parents’ Income Toward students’ Ability in Learning Englis of Pre-Internasional Students at Economic and Business Faculty of Malikussaleh University”. Almufi Journal of Measurement, Assessment, and Evaluation Education, vol. 1, no. 2, Januari 2022, hlm. 155-61, https://www.almufi.com/index.php/AJMAEE/article/view/106.