Trevelyan, George Macaulay, 1876-1962, author
Longmans, Green, 1951
Buku Teks
Stephen, Leslie, 1832-1904, author
University Paperbacks, 1963
Buku Teks
Richetti, John, author
John Wiley & Sons, 2017
Buku Teks
Ward, A.C., author
Longman, 1955
Buku Teks
Trevelyan, George Macaulay, 1876-1962, author
Longmans, Green, 1950
Buku Teks