Olbers, Dirk, author
Springer, 2012
eBooks
Mei, Chiang C., author
John Wiley & Sons, 1983
Buku Teks
edited by Ooi Kee Beng and Ding Choo Ming
ISEAS, 2007
Buku Teks
Macquitty, Miranda
Firefly Books, 1997
Buku Referensi
Neumann, G. (Gerhard), author
Elsevier, 1968
Buku Teks