Hall, Walter Phelps, author
Ginn and Company, 1953
Buku Teks
Larson, Laurence M., author
Holt , 1926
Buku Teks
Morton, A.L., author
Victor Gollancz, 1938
Buku Teks
Bindoff, S.T., author
Penguin Books, 1951
Buku Teks
Read, Donald
Longman, 1994
Buku Teks