Malaysia year book 1971
The Straits Times Press, 1971
Buku Teks
Mining And Energy Year Book
Buku Teks
The china year book 1926
Simpkin, Marshall, Hamilton, Kent, 1927
Buku Teks
2002 britannica book of the year
Chicago: Encyclopedia Britanica, 2002,
Buku Referensi
Loehrer, Patrick J.
The year book of oncology
Elsevier, 2005
Buku Referensi