DJVU PDF Butler, S. 1996, "English in Asia", in The Fourth International Symposium on Language and Linguistics, Thailand, pp. 1535-1553. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU Luce, G.H. undated, "Riang lexicon and translation notes", in Luce Collection, MS 6574-7, pp. 048a-049b. National Library of Australia. cite.