Sang,Heng-Kang. (1995). Project evaluation: Techniques and practices for developing countries. Ashgate.
Παραπομπή Chicago StyleSang,Heng-Kang. Project Evaluation: Techniques and Practices for Developing Countries. U K: Ashgate, 1995.
Παραπομπή MLASang,Heng-Kang. Project Evaluation: Techniques and Practices for Developing Countries. Ashgate, 1995.
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