Dorji และ Tshering. (1990) Leadership factors affecting development in technical co-operation among developing villages. Mahidol University,:ม.ป.ท.Dorji และ Tshering. 1990. Leadership factors affecting development in technical co-operation among developing villages. ม.ป.ท.:Mahidol University,;Dorji และ Tshering. Leadership factors affecting development in technical co-operation among developing villages. ม.ป.ท.:Mahidol University, 1990. Print.