Bagehot, Walter
Oxford University Press, 1977
Buku Teks
George G. Harrap, 1939
Koleksi Publik
Macaulay, Lord, author
Longmans, 1874
Koleksi Publik
Gillespie, Stuart, author
Wiley, 2011
Buku Teks
Sampson, George, author
University Press, 1949
Buku Referensi