Peesing, J., A. Sirisaewakul, J. Rujirutchakul, R. Laojira-aungkoon, T. Duangpanow, and S. Puongsup. “Compliance with Non-Smokers’ Health Protection Law by Restaurants in the Five Central Provinces, Thailand”. Thai Journal of Health Education, vol. 37, no. 3, Feb. 2019, pp. 45-60, https://he01.tci-thaijo.org/index.php/muhed/article/view/174662.