Home › Authors › Ruengdet Pankhuenkhat. 👤 Ruengdet Pankhuenkhat. 4 books Books by Ruengdet Pankhuenkhat. Nithān phư̄nbān Lāo Nithān phư̄nbān Lāo 1999 Bæp thotsop rabop siang wannayuk phasa thin = 1989 Phasa thin trakun Thai Phasa thin trakun Thai 1982 An introduction to Thai syntax An introduction to Thai syntax 1978