Schugar, Heather R., and Mariam Jean Dreher. “U. S. Fourth graders’ ınformational Text Comprehension: ındicators from NAEP”. International Electronic Journal of Elementary Education, vol. 9, no. 3, Aug. 2017, pp. 523-52, https://www.iejee.com/index.php/IEJEE/article/view/175.