Tatchawadeekittireuk K, Keawsurapon N, Pengman H. Factors Affecting the Decision to Purchase Health Supplements for Elders in Hat Yai and Muang Songkhla Districts. ecbajournal [internet]. 2020 Jun. 27 [cited 2026 Sep. 13];12(1):65-82. available from: https://so01.tci-thaijo.org/index.php/ecbatsu/article/view/238287