Tomalin, Marcus, author
Cambridge University Press, 2006
Buku Teks
edited by Anne E. Baker and Kees Hengeveld
Wiley-Blackweell, 2012
Buku Teks
edited by Archibald A. Hill
Voice of America, 1969
Buku Teks
Cambridge University Press, 2006
eBooks
Carr, Philip, 1953-, author
Cambridge University Press , 1990
Buku Teks