Visit Sripibool และผู้แต่งคนอื่นๆ. (2010) The impact of intellectual property rights protection on technological progress. National Institute of Development Administration:ม.ป.ท.Visit Sripibool และผู้แต่งคนอื่นๆ. 2010. The impact of intellectual property rights protection on technological progress. ม.ป.ท.:National Institute of Development Administration;Visit Sripibool และผู้แต่งคนอื่นๆ. The impact of intellectual property rights protection on technological progress. ม.ป.ท.:National Institute of Development Administration, 2010. Print.