Arnscheidt, Julia, author
Leiden University Press, 2009
Buku Teks
Ima Apriliani, author
2014
UI - Skripsi (Membership)
Sudargo Gautama, author
Alumni, 2007
Buku Teks
Nunan, David
Penguin English, 1993
Buku Teks
Coulthard, Malcolm, author
Longman, 1985
Buku Teks