Baharuddin, M., and W. S. Wan Abdullah. “The Book Al-Jabr Wa Al-Muqābalah: A Research on Its Content, Writing Methodology and Elementary Algebra by Al-Khwārizmī”. Afkar: Jurnal Akidah &Amp; Pemikiran Islam, vol. 15, no. 1, June 2014, pp. 135-62, https://ejournal.um.edu.my/index.php/afkar/article/view/5743.