Srimee, P., Siangsai, P., Yoddamnern, W., Boontanom, W., Chaidet, E. and Kosuwin, R. 2023. Developing a self-learning package through line application: A case study on food sanitation for coffee shop, Ongkharak District, Nakhon Nayok Province. Journal of Public Health and Health Sciences Research. 5, 2 (Aug. 2023), 120–135.