Ningrum, A. S. B. ., and R. A. . Wibowo. “Intelligence Quotient (IQ) As a Predictor of Reading Comprehension and Writing Achievement of EFL Learners”. JEELS (Journal of English Education and Linguistics Studies), vol. 4, no. 1, May 2017, pp. 53-79, doi:10.30762/jeels.v4i1.331.