Qiu และผู้แต่งคนอื่นๆ. (2022) An analysis of the causes of professional development of elementary school teachers in Yunnan Province by involution. National Institute of Development Administration:ม.ป.ท.Qiu และผู้แต่งคนอื่นๆ. 2022. An analysis of the causes of professional development of elementary school teachers in Yunnan Province by involution. ม.ป.ท.:National Institute of Development Administration;Qiu และผู้แต่งคนอื่นๆ. An analysis of the causes of professional development of elementary school teachers in Yunnan Province by involution. ม.ป.ท.:National Institute of Development Administration, 2022. Print.