Jordan, R. Furneaux, author
Thames, [Date of publication not identified]
Buku Teks
Roth, Leland M
Harper & Row Publishers, 1979
Buku Teks
Sutton, Ian, author
TThames & Hudson, 2001
Buku Teks
Nussbaum, Arthur, author
Macmillan, 1958
Buku Teks
Younger, R. M.
Victoria Hutchinson Group 1982
Buku Teks