Nasution, D. S., M. H. Batubara, and R. Rahmayana. “Increasing Students’ Ability In Writing Procedure Text Through Learning Model Pictures And Pictures”. Journal of Linguistics, Literature, and Language Teaching (JLLLT), vol. 1, no. 1, Nov. 2021, pp. 8-19, doi:10.37249/jlllt.v1i1.302.