Weerachai Thavornthon และผู้แต่งคนอื่นๆ. (2009) Household expenditure, debt and happiness in the rural area. National Institute of Development Administration:ม.ป.ท.Weerachai Thavornthon และผู้แต่งคนอื่นๆ. 2009. Household expenditure, debt and happiness in the rural area. ม.ป.ท.:National Institute of Development Administration;Weerachai Thavornthon และผู้แต่งคนอื่นๆ. Household expenditure, debt and happiness in the rural area. ม.ป.ท.:National Institute of Development Administration, 2009. Print.