Allen, Gerald R., author
Periplus, 1997
Buku Referensi
Sumich, James L., author
McGraw-Hill, 1999
Buku Teks
Sumich, James L., author
Wm.C. Brpwn, 1992
Buku Teks
Sheppard, Charles, author
Academic Press, 1992
Buku Teks
The Library Unesco/Rostsea
Unesco/Rostsea, 1992
Buku Referensi