Gass, Susan M. Second language acquisition : an introductory course / Susan M. Gass, Jennifer Behney and Luke Plonsky. - 4th ed. - New York : Routledge, c2013. - xxiv, 623 p.: 26 cm. Includes bibliographical references and indexes. ISBN: 9780415894951 Subjects--Topical Terms: Second language acquisition. Dewey Class. No.: 418 / GAS