Boun-Oum Siripholdej. 1993. An in-service training model for secondary school administrators in Laos. Graduate School, Khon Kaen University;
Boun-Oum Siripholdej. (1993) An in-service training model for secondary school administrators in Laos . Khon Kaen University/Khon Kaen.
Boun-Oum Siripholdej. An in-service training model for secondary school administrators in Laos. . Khon Kaen:Khon Kaen University, 1993.
Boun-Oum Siripholdej. (1993) An in-service training model for secondary school administrators in Laos . Khon Kaen University/Khon Kaen.