Urairat Netharn และผู้แต่งคนอื่นๆ. (2009) Variance estimation for adaptive cluster sampling with a single primary unit and the partially systematic adaptive cluster sampling. National Institute of Development Administration:ม.ป.ท.Urairat Netharn และผู้แต่งคนอื่นๆ. 2009. Variance estimation for adaptive cluster sampling with a single primary unit and the partially systematic adaptive cluster sampling. ม.ป.ท.:National Institute of Development Administration;Urairat Netharn และผู้แต่งคนอื่นๆ. Variance estimation for adaptive cluster sampling with a single primary unit and the partially systematic adaptive cluster sampling. ม.ป.ท.:National Institute of Development Administration, 2009. Print.