Supot Chittasutthiyan และ William Chapman. (2009) Aesthetics of world heritage : Thai temples and ruins, Sukhothai Historical Park and associated sites. Silpakorn University,:ม.ป.ท.Supot Chittasutthiyan และ William Chapman. 2009. Aesthetics of world heritage : Thai temples and ruins, Sukhothai Historical Park and associated sites. ม.ป.ท.:Silpakorn University,;Supot Chittasutthiyan และ William Chapman. Aesthetics of world heritage : Thai temples and ruins, Sukhothai Historical Park and associated sites. ม.ป.ท.:Silpakorn University, 2009. Print.