Masterton, William L., author
Saunders Golden, 1997
Buku Teks
Nekrasov, B., author
Peace, 1965
Buku Teks
Nekrasov, B., author
Peace, [Date of publication not identified]
Buku Teks
Partington, J. R.
The English Language Book Society, 1965
Buku Teks
Barnett, E. de Barry, author
Longmans Green, 1957
Buku Teks