↑ Coedès, George (1968). Walter F. Vella (biên tập). The Indianized States of Southeast Asia. trans.Susan Brown Cowing. University of Hawaii Press. ISBN978-0-8248-0368-1.
↑ Gosling, Betty. Sukhothai Its History, Culture, And Art Asia Books (Oxford University Press), Bangkok 1991, ISBN 974-8206-85-8