Wachakorn Nopnarin และ Thanach Kanokthet. (2023) Factors influencing preparation for becoming Quality elderly people in Mueang District, Phitsanulok Province. <i>Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University</i>, <i>17</i>(1), 340-351.Wachakorn Nopnarin และ Thanach Kanokthet. "Factors influencing preparation for becoming Quality elderly people in Mueang District, Phitsanulok Province". Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 17 (2023):340-351.Wachakorn Nopnarin และ Thanach Kanokthet. Factors influencing preparation for becoming Quality elderly people in Mueang District, Phitsanulok Province. Pibulsongkram Rajabhat University:ม.ป.ท. 2023.