Poet lōk thurakit rangnok sǣnlān bannāthikān Phǣtthrik Čhōrī læ Čhirawat Sǣngthō̜ng = Birds' nests : secrets of a billion-dollar business - Jory, Patrick; Jirawat Saengthong (The Thailand Research Fund, The Regional Studies Program, School of Liberal Arts, Walailak Univeristy, 2007)