Syamsul Bachri Thalib, Herlina, and Tarmizi Thalib. “Verbal and Numerical Abilities of Students in Senior High School in Wajo Regency, South Sulawesi, Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 60, no. 4, Nov. 2021, pp. 232-40, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/13457.