Thanawit Butr-Udom และผู้แต่งคนอื่นๆ. (2007) The quality of life of Thai labour in Singapore. National Institute of Development Administration:ม.ป.ท.Thanawit Butr-Udom และผู้แต่งคนอื่นๆ. 2007. The quality of life of Thai labour in Singapore. ม.ป.ท.:National Institute of Development Administration;Thanawit Butr-Udom และผู้แต่งคนอื่นๆ. The quality of life of Thai labour in Singapore. ม.ป.ท.:National Institute of Development Administration, 2007. Print.