Prayod Chamkham. 2001. Factors related to patterns of life after having joined the early retirement programme : a study of teachers in the central region of the Office of the National Primary Education Commission. Field of Study Population Education, Mahidol University;
Prayod Chamkham. (2001) Factors related to patterns of life after having joined the early retirement programme : a study of teachers in the central region of the Office of the National Primary Education Commission . Mahidol University/Bangkok.
Prayod Chamkham. Factors related to patterns of life after having joined the early retirement programme : a study of teachers in the central region of the Office of the National Primary Education Commission. . Bangkok:Mahidol University, 2001.
Prayod Chamkham. (2001) Factors related to patterns of life after having joined the early retirement programme : a study of teachers in the central region of the Office of the National Primary Education Commission . Mahidol University/Bangkok.