Carrol, B., West, R. ESU (English Speaking Union) Framework. London: Longman, 1989 120 p. 0-582-03161-3.
Carrol, B., West, R. ESU (English Speaking Union) Framework. London: Longman, 1989 120 p. 0-582-03161-3.
Carrol, B., West, R. (1989) ESU (English Speaking Union) Framework, London: Longman 120 p. 0-582-03161-3.
Carrol, B., & West, R. (1989). ESU (English Speaking Union) Framework. Perfomance Scales for English Language Examinations. London: Longman, 120 p.
Carrol B, West R. ESU (English Speaking Union) Framework: Perfomance Scales for English Language Examinations. London: Longman; 1989. p. 120 p. ISBN: 0-582-03161-3.