Hatten, Timothy S., author
Prentice-Hall, 1997
Buku Referensi
Dawe, Bruce, author
Cheshire, 1969
Buku Teks
Camp, L. Sprague de, author
Holt, Rinehart & Winston, 1952
Buku Teks
Teik, Khoo Boo, author
Aed Book, 2003
Buku Teks
The Johns Hopkins University Press, 1995
Buku Teks