Nekrasov, B.
Peace, [Date of publication not identified]
Buku Teks SO
Barnett, E. de Barry
Longmans Green, 1957
Buku Teks SO
Partington, J. R.
The English Language Book Society, 1965
Buku Teks SO
Whitten, Kenneth W.
Saunders College, 1992
Buku Teks SO
Umland, Jean B.
Brooks/Cole, 1999
Buku Teks SO