Tanitta Sungtiwong. 2010. An analysis of ordinary national educational test (O-NET): emphasis on language features. , Chiangrai Rajabhat University;
Tanitta Sungtiwong. (2010) An analysis of ordinary national educational test (O-NET): emphasis on language features . Chiangrai Rajabhat University/Chiangrai province.
Tanitta Sungtiwong. An analysis of ordinary national educational test (O-NET): emphasis on language features. . Chiangrai province:Chiangrai Rajabhat University, 2010.
Tanitta Sungtiwong. (2010) An analysis of ordinary national educational test (O-NET): emphasis on language features . Chiangrai Rajabhat University/Chiangrai province.