Routledge , 1996
Buku Teks
Shelley McKeown; Reeshma Haji; Neil Ferguson, editor
Springer, 2016
Buku Teks
Robert W. Hefner, editor
Routledge, Taylor & Francis Group, 2018
Buku Teks
Esmeralda, author
Times edition PTE, 1997
Buku Referensi
Peter Salim, author
Modern English Press, 1990
Buku Referensi