Singleton, David Michael Language acquisition : the age factor / David Singleton and Lisa Ryan - 2nd ed. - Clevedon : Multilingual Matters, c2004 - 289 p. - Second language acquisition ; 9 . Includes bibliographical references and index ISBN: 1853597570 Subjects--Topical Terms: LANGUAGE ACQUISITION--AGE FACTORS LC Class. No.: P118.65 / S563L 2004