Douglas, D. (2012). Commentary on Establishing a Life-Language Model of Proficiency: A New Challenge for Language Testers. International Journal of Language Testing, 2(2), 109-111.
MLA
Dan Douglas. "Commentary on Establishing a Life-Language Model of Proficiency: A New Challenge for Language Testers". International Journal of Language Testing, 2, 2, 2012, 109-111.
HARVARD
Douglas, D. (2012). 'Commentary on Establishing a Life-Language Model of Proficiency: A New Challenge for Language Testers', International Journal of Language Testing, 2(2), pp. 109-111.
VANCOUVER
Douglas, D. Commentary on Establishing a Life-Language Model of Proficiency: A New Challenge for Language Testers. International Journal of Language Testing, 2012; 2(2): 109-111.