Padilla, Joseph E., and Corazon A. Padilla. “Multimodal Discourse Analysis of COVID-19 Vaccination Campaign Posters: Visual Grammar Approach”. Silliman Journal 63, no. 2 (March 27, 2023). Accessed April 25, 2024. https://sillimanjournal.su.edu.ph/index.php/sj/article/view/357.