Swari Sinaga, T. I. ., E. . Sinambela, A. . Gea, and Carolina. “The Effect of Collaborative Strategy Reading and Guided Reading Peer Questioning Strategy on Students’ Achievement in Reading Comprehension”. Cetta: Jurnal Ilmu Pendidikan, vol. 3, no. 3, Dec. 2020, pp. 556-64, https://jayapanguspress.penerbit.org/index.php/cetta/article/view/1930.