Saville-Troike, Muriel, 1936-
Introducing second language acquisition
Cambridge University Press , 2006
 Buku Teks
Saville-Troike, Muriel, 1936-
Introducing second language acquisition
Cambridge University Press, 2012
 Buku Teks SO
Mitchell, Rosamond
Second language learning theories
Arnold, 1998
 Buku Teks SO
Hoff, Erika, 1951-
Language development
Wadsworth, 2005
 Buku Teks
Hoff, Erika, 1951-
Language development
Wadsworth and Cengage Learning, 2014
 Buku Teks