Jatuporn Arunlerktawin. (2000) Roles and behaviros of foundation volunteers in assisting society as perceived by metropolitan investigation police. Mahidol University,:ม.ป.ท.Jatuporn Arunlerktawin. 2000. Roles and behaviros of foundation volunteers in assisting society as perceived by metropolitan investigation police. ม.ป.ท.:Mahidol University,;Jatuporn Arunlerktawin. Roles and behaviros of foundation volunteers in assisting society as perceived by metropolitan investigation police. ม.ป.ท.:Mahidol University, 2000. Print.