Surat Chayavoradech และ Sillapaporn Srijunpetch. (2007) Investigating earnings management by surplus free cash flow, and external monitoring :. Faculty of Commerce and Accountancy, Thammasat University,:ม.ป.ท.Surat Chayavoradech และ Sillapaporn Srijunpetch. 2007. Investigating earnings management by surplus free cash flow, and external monitoring :. ม.ป.ท.:Faculty of Commerce and Accountancy, Thammasat University,;Surat Chayavoradech และ Sillapaporn Srijunpetch. Investigating earnings management by surplus free cash flow, and external monitoring :. ม.ป.ท.:Faculty of Commerce and Accountancy, Thammasat University, 2007. Print.