Apiraporn Vasavakul และ Sumalee Chinokul. (2006) Business English oral communication (BEOC) for customer services staff at international banks : translating needs analysis to a course development. Chulalongkorn University:ม.ป.ท.Apiraporn Vasavakul และ Sumalee Chinokul. 2006. Business English oral communication (BEOC) for customer services staff at international banks : translating needs analysis to a course development. ม.ป.ท.:Chulalongkorn University;Apiraporn Vasavakul และ Sumalee Chinokul. Business English oral communication (BEOC) for customer services staff at international banks : translating needs analysis to a course development. ม.ป.ท.:Chulalongkorn University, 2006. Print.