S. M. Br Rajagukguk, K. E. Tarigan, and F. Y. A. Ginting, “IMPROVING THE STUDENTS’ READING COMPREHENSION BY USING PQ4R STRATEGY TO THE EIGHTH GRADE AT SMP NEGERI 2 PANCUR BATU”, KAIROS, vol. 3, no. 2, pp. 93–107, Jul. 2020.