Nelwan, S. M., N. Pelenkahu, and P. Hampp. “Increasing Students’ Vocabulary Mastery by Using Pictures at Smp Negeri 2 Tondano”. JoTELL : Journal of Teaching English, Linguistics, and Literature, vol. 3, no. 7, Apr. 2025, pp. 820-33, doi:10.36582/jotell.v3i7.9557.