De Mallet Burgess, Thomas, author
Routledge, 2000
Buku Referensi
Hill, Susan, author
Longman, [date of publication not identified]
Buku Teks
Jang, Yeonok
Scarecrow Press, 2014
Buku Teks
Carver, Charles S., author
Pearson, 2008
Buku Teks
Routledge, 1992
Buku Teks