edited by Harriet Luria, Deborah M. Seymour, Trudy Smoke
LEA, 2006
Buku Teks
Bussmann, Hadumod, author
Routledge, 1996
Buku Referensi
McArthur, Thomas Burns, author
Cambridge University Press, 1983
Buku Teks SO
edited by Valerie Kinsella
Cambridge Uniiversity Press , 1979
Buku Teks
Croft, William, author
Cambridge University Press, 2004
Buku Teks