Cowan, Henry J.
E&FN Spon, 1998
Buku Teks SO
Reid, D.A.G
London: Longman, 1966
Buku Teks
Spens, Michael
Academic Edition, 1995
Buku Teks SO
Reid, D.A.G.
London: Longman, 1966
Buku Teks
McKay, W.B.
English Language Book Society and Longman, 1971
Buku Teks SO