Uraiwan Kanungsukkasem และผู้แต่งคนอื่นๆ. (1991) Patterns and determinants of health service utilization in rural Thailand : a case study of Nakorn Sawan. National Institute of Development Administration:ม.ป.ท.Uraiwan Kanungsukkasem และผู้แต่งคนอื่นๆ. 1991. Patterns and determinants of health service utilization in rural Thailand : a case study of Nakorn Sawan. ม.ป.ท.:National Institute of Development Administration;Uraiwan Kanungsukkasem และผู้แต่งคนอื่นๆ. Patterns and determinants of health service utilization in rural Thailand : a case study of Nakorn Sawan. ม.ป.ท.:National Institute of Development Administration, 1991. Print.