Richards, Jack C., author
Cambridge University Press, 1994
Buku Teks
Cook, Vivian, author
ARNOLD, 2001
Buku Teks SO
Littlewood, William, author
Cambridge University Press, 1994
Buku Teks
Littlewood, William, author
Cambridge University Press, 1998
Buku Teks
Lonergan, Jack, author
Cambridge University Press , 1994
Buku Teks