N. Likhittham, R. Samakkeekarom, P. Hanthip, and S. Phonsa, “Awareness and Barriers to the Prevention of COVID-19 Infection Among Homeless People in Homeless Shelter in Bangkok and Pathum Thani Provinces”, วารสารวิจัยสังคมและปริทัศน์, vol. 44, no. 1, pp. 11–52, Oct. 2022.