Watana Patanapongse. (1996) Principle and technique of case study research. National Institute of Development Administration:ม.ป.ท. 10.14457/NIDA.res.1996.1

Watana Patanapongse. 1996. Principle and technique of case study research. ม.ป.ท.:National Institute of Development Administration; 10.14457/NIDA.res.1996.1

Watana Patanapongse. Principle and technique of case study research. ม.ป.ท.:National Institute of Development Administration, 1996. Print. 10.14457/NIDA.res.1996.1