Fernald, A., Marchman, V., & Weisleder, A. (2012). SES differences in language processing skill and vocabulary are evident at 18 months. Developmental Science, 16(2), 234-248. doi: 10.1111/desc.12019
Hosseinpour, V., Yazdani, S., & Yarahmadi, M. (2015). The Relationship between Parents' Involvement, Attitude, Educational Background and Level of Income and Their Children's English Achievement Test Scores. Journal Of Language Teaching And Research, 6(6), 1370. doi: 10.17507/jltr.0606.27
Mankiw, G. (2009). The Least Surprising Correlation of All Time. Retrieved from gregmankiw.blogspot.com
Kelly, M. (2013). Poor concentration: Poverty reduces brainpower needed for navigating other areas of life. Retrieved from princeton.edu
Fisher, M. (2009). Why Are Rich Kids Smarter?. Retrieved from theatlantic.com
Liu, Y. (2013). Meritocracy and the Gaokao: a survey study of higher education selection and socio-economic participation in East China. British Journal Of Sociology Of Education, 34(5-6), 868-887. doi: 10.1080/01425692.2013.816237
PTN Kurangi Kuota Tanpa Tes, Rapor Tak Sepenuhnya Relevan. (2017). Retrieved from warmadewa.ac.id
The Pew Charitable Trust. (2012). Pursuing the American Dream: Economic Mobility Across Generations [Ebook] (pp. 3, 23-26). Retrieved from pewtrusts.org
Lainnya
Will, G. How merit-based college admissions became so unfair. Retrieved from washingtonpost.com
Ripley, A. (2014). The New SAT Doesn't Come Close to the World's Best Tests. Retrieved from time.com