Trevelyan, George Macaulay, 1876-1962, author
Longmans, Green, 1945
Buku Teks
Stuart, Dorothy Margaret.
Macmillan, 1952
Buku Teks
Jackson, R.M. (Richard Meredith), 1903-1986, author
University Press, 1953
Buku Teks
Jackson, R.M. (Richard Meredith), 1903-1986, author
Cambridge University Press, 1975
Buku Teks
Rose, Richard, 1933-, author
Scott, Foreman, 1989
Buku Teks