Seeley, Ivor H.
Macmillan, 1995
Buku Teks
Reid, D. A. G
London: Longman, 1966
Buku Teks
Reid, D. A. G.
London: Longman, 1966
Buku Teks
Spens, Michael, author
Academic Edition, 1995
Buku Teks
McKay, W.B.
The English Language Book Society and Longman, 1971
Buku Teks