Aim-on Leesakulthip และ Tanom Tiensawangchai. (2009) Perceived value and desirable characteristics of wooden toys in the view of parents of children aged under 7. Thammasat University:ม.ป.ท.Aim-on Leesakulthip และ Tanom Tiensawangchai. 2009. Perceived value and desirable characteristics of wooden toys in the view of parents of children aged under 7. ม.ป.ท.:Thammasat University;Aim-on Leesakulthip และ Tanom Tiensawangchai. Perceived value and desirable characteristics of wooden toys in the view of parents of children aged under 7. ม.ป.ท.:Thammasat University, 2009. Print.