Ismail, H., R. A. Bakri, S. Saiful, and Y. Kurnia. “Empowering Students’ Vocabulary Through Vocab-O-Gram at Senior High School Level”. FOSTER: Journal of English Language Teaching, Vol. 3, no. 3, Sept. 2022, pp. 160-71, doi:10.24256/foster-jelt.v3i3.108.