Mai และผู้แต่งคนอื่นๆ. (2011) Enhancing successful inter-organization relationships : a study of Vietnamese travel companies with Thai partners. National Institute of Development Administration:ม.ป.ท.Mai และผู้แต่งคนอื่นๆ. 2011. Enhancing successful inter-organization relationships : a study of Vietnamese travel companies with Thai partners. ม.ป.ท.:National Institute of Development Administration;Mai และผู้แต่งคนอื่นๆ. Enhancing successful inter-organization relationships : a study of Vietnamese travel companies with Thai partners. ม.ป.ท.:National Institute of Development Administration, 2011. Print.