Lestari, F. D., R. O. Simarmata, N. Sitorus, and U. Sidabutar. “Code and Messages Interpretation on COVID-19 Street Banner: Social Semiotics”. Linguistics and Culture Review, vol. 5, no. S3, Dec. 2021, pp. 1678-91, doi:10.21744/lingcure.v5nS3.1955.