Johns, Ann M.
Cambridge University Press, 1997
Buku Teks
McCormick, Kathleen A.
Manchester University Press, 1994
Buku Teks
Mills, Paul
Routledge, 2006
Buku Teks
Mills, Paul
Routledge, 2006
Koleksi Publik
Brookes, Arthur
Cambridge University Press, 1990
Buku Teks