Spears, Richard A., author
Erlangga, 1999
Buku Referensi
Spears, Richard A., author
Erlangga, 1987
Buku Referensi
Makkai, Adam
Barrons, 1995
Buku Teks
compiled and translated by Ismail Mazhar
The Renaissance Bookshop, 1950
Buku Referensi
Wood, Frederick T., author
Macmillan, 1995
Buku Referensi