Wilson, Diana Hardy
Kaki Bukit Techpark II : Page One Publishing,2002,
Buku Referensi
Yasin Hamid Safadi, author
Thames and Hudson, 1978
Buku Referensi
Cheng, Tingyou, author
International Press, 2004
Buku Teks
Chiang, Yee
Methuen, 1954
Buku Teks
King Faisal Center for Research and Islamic Studies, 1986
Buku Referensi