Sadiva, Afrian, et al. “Correlation Between Vocabulary Mastery and Writing Skill Development of Sixth-Grade Students at SDIT Insan Utama 1 Pekanbaru”. (الطموحات ) EL-THUMUHAT, vol. 9, no. 2, Aug. 2026, pp. 75-89, doi:10.25299/elthumuhat.2026.16798.