Rachakorn Apipongsathorn. 2002. study of the relationship between a knowledge of English grammar and the ability to apply grammar to business writing with regard to the Telephone Organization of Thailand's personnelRachakorn Apipongsathorn. Field of Study Communicative English, Ramkhamhaeng University;

Rachakorn Apipongsathorn. study of the relationship between a knowledge of English grammar and the ability to apply grammar to business writing with regard to the Telephone Organization of Thailand's personnelRachakorn Apipongsathorn. . Bangkok:Ramkhamhaeng University, 2002.

Rachakorn Apipongsathorn. (2002) study of the relationship between a knowledge of English grammar and the ability to apply grammar to business writing with regard to the Telephone Organization of Thailand's personnelRachakorn Apipongsathorn . Ramkhamhaeng University/Bangkok.