Praiwan Loto. 2006. "Politeness" a study of the language specific structuring of a concept [German-Thai]. Field of Study German as a Foreign Language, Ramkhamhaeng University;
Praiwan Loto. (2006) "Politeness" a study of the language specific structuring of a concept [German-Thai] . Ramkhamhaeng University/Bangkok.
Praiwan Loto. "Politeness" a study of the language specific structuring of a concept [German-Thai]. . Bangkok:Ramkhamhaeng University, 2006.
Praiwan Loto. (2006) "Politeness" a study of the language specific structuring of a concept [German-Thai] . Ramkhamhaeng University/Bangkok.