Zulvia Misykah, M.Syarif Sumantri, & Deasyanti. (2018). The Effect of PQ4R Strategy and Intellectual Intelligence on Higher Thinking Ability in Mathematics in Elementary Schools. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE, 4(9), 126–130. https://doi.org/10.31695/IJASRE.2018.32885