Nampetch Suphakijyothin. 2001. Factors constraining English conversational behavior of Thai cabin crew during in-flight service for non-Thai passengers. Field of Study Communicative English, Ramkhamhaeng University;
Nampetch Suphakijyothin. (2001) Factors constraining English conversational behavior of Thai cabin crew during in-flight service for non-Thai passengers . Ramkhamhaeng University/Bangkok.
Nampetch Suphakijyothin. Factors constraining English conversational behavior of Thai cabin crew during in-flight service for non-Thai passengers. . Bangkok:Ramkhamhaeng University, 2001.
Nampetch Suphakijyothin. (2001) Factors constraining English conversational behavior of Thai cabin crew during in-flight service for non-Thai passengers . Ramkhamhaeng University/Bangkok.