Sonporn Sirikhan. 2010. Assessing pragmatic ability of Thai hotel management and tourism students in the context of hotel front office department. Field of Study English as an Internation Language, Chulalongkorn University; DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/CU.the.2010.11
Sonporn Sirikhan. (2010) Assessing pragmatic ability of Thai hotel management and tourism students in the context of hotel front office department . Chulalongkorn University/Bangkok. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/CU.the.2010.11
Sonporn Sirikhan. Assessing pragmatic ability of Thai hotel management and tourism students in the context of hotel front office department. . Bangkok:Chulalongkorn University, 2010. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/CU.the.2010.11
Sonporn Sirikhan. (2010) Assessing pragmatic ability of Thai hotel management and tourism students in the context of hotel front office department . Chulalongkorn University/Bangkok. DOI : https://doi.nrct.go.th/ListDoi/listDetail?Resolve_DOI=10.14457/CU.the.2010.11