Watchareeporn Chaimongkol และผู้แต่งคนอื่นๆ. (2005) Three composite imputation methods for item nonresponse estimation in sample surveys. National Institute of Development Administration:ม.ป.ท.Watchareeporn Chaimongkol และผู้แต่งคนอื่นๆ. 2005. Three composite imputation methods for item nonresponse estimation in sample surveys. ม.ป.ท.:National Institute of Development Administration;Watchareeporn Chaimongkol และผู้แต่งคนอื่นๆ. Three composite imputation methods for item nonresponse estimation in sample surveys. ม.ป.ท.:National Institute of Development Administration, 2005. Print.