Khan, T. S., Jehangir, M., Niwaz, A., Khan, M. M., Shahzad, M., & Khan, M. S. (2018). Statistical Approach: Understanding the Effects of Preview, Question, Read, Reflect, Recite, Review (PQ4R) on Academic Achievement of Students in English. The Nucleus, 55(2), 61–65. Retrieved from http://202.83.167.189/index.php/Nucleus/article/view/246