Prajak Monjamlang และ Supong Tangkiengsirisin. (2009) Relationship between the environmental awareness and environmentally friendly behavior :. Thammasat University:ม.ป.ท.Prajak Monjamlang และ Supong Tangkiengsirisin. 2009. Relationship between the environmental awareness and environmentally friendly behavior :. ม.ป.ท.:Thammasat University;Prajak Monjamlang และ Supong Tangkiengsirisin. Relationship between the environmental awareness and environmentally friendly behavior :. ม.ป.ท.:Thammasat University, 2009. Print.