Kartianom, Kartianom, and Oscar Ndayizeye. “What "˜s Wrong With the Asian and African Students’ Mathematics Learning Achievement? The Multilevel PISA 2015 Data Analysis for Indonesia, Japan, and Algeria”. Jurnal Riset Pendidikan Matematika, vol. 4, no. 2, Nov. 2017, pp. 200-1, doi:10.21831/jrpm.v4i2.16931.