Fielding, K.J., author
Longman, Green, 1953
Buku Teks
Mee, Jon, author
Cambridge University Press , 2010
Buku Teks
Patten, Robert L., author
Cambridge University Press, 2012
Buku Teks
Chesterton, Gilbert Keith, 1874-1936, author
Cont Book, 1946
Buku Teks
Foster, John
Oxford University, 1969
Buku Teks