Al-Refai , A. M. ., and W. H. . Al-Omari. “The Extent of Including Environmental Education in Action Pack Series from Five to Seven”. Dirasat: Educational Sciences, vol. 47, no. 3, Sept. 2020, pp. 430-41, http://dsr.ju.edu.jo/djournals/index.php/Edu/article/view/2428.