Porraphat Puttarak. 2011. An analysis of English language used in spa menus in Thailand. , Chiang Rai Rajabhat University;
Porraphat Puttarak. (2011) An analysis of English language used in spa menus in Thailand . Chiang Rai Rajabhat University/Chiangrai.
Porraphat Puttarak. An analysis of English language used in spa menus in Thailand. . Chiangrai:Chiang Rai Rajabhat University, 2011.
Porraphat Puttarak. (2011) An analysis of English language used in spa menus in Thailand . Chiang Rai Rajabhat University/Chiangrai.