Smith, Henry, author
Oxford University Press, 1951
Buku Teks
Lockyer, K.G., author
Sir Isaac Pitman and Sons, 1969
Buku Teks
Fairclough, Norman, author
Rotledge, 2010
Buku Teks
Marx, Karl, 1818-1883, author
Foreign Languages Publishing House, 1958
Buku Teks
edited by Ruth Wodak
Sage, 2013
Buku Teks