Aisyah, S.K. and Sarwoprasodjo, S. 2024. Plastic Free Market Campaign: The Effect of Message Elaboration Level on Trader’s Attitudes. Ultimacomm: Jurnal Ilmu Komunikasi. 16, 1 (Nov. 2024), 123–142. DOI:https://doi.org/10.31937/ultimacomm.v16i1.3386.