Eaton-Krauss, Marianne
Griffith Institute, 1993
Buku Teks
Malek, Jaromir, author
Andre Deutsch, 2010
Buku Referensi
Weeks, Kent R.
William Morrow, 1997
Buku Teks
Casson, Lionel, author
Time-Life Books, 1965
Buku Teks
Bloomfiel, L. M.
The Carswell Company, Limited, 1957
Buku Teks