Kerlogue, Fiona, author
Thames & Hudson, 2004
Buku Referensi
WHO, 1981
Buku Teks
Montes, Manuel F., author
Institute of Southeast Asian Studies , 1998
Buku Teks
ASEAN Focus Group ; edited by Peter Church
Allen & Unwin, 1995
Buku Teks
Heidhues, Mary Somers, author
Thames dan Hudson , 2000
Buku Teks