edited by Tony Buxton, Paul Chapman and Paul Temple
Routledge , 1994
Buku Teks
Gregg, Pauline, author
George G. Harrap, 1952
Buku Teks
A.G. Champion...[et al.]
Baltimore, Md., USA: Arnold, 1987
Buku Teks
Lenin, Vladimir I., author
Foreign Languages Publishing House , [date of publication not identified]
Buku Teks
Allen, G.C.
Longmans, Green and Co., 1961
Buku Teks