World Health Organization
World Health Organization, 1978
Buku Teks
World Health Organization, 1993
Buku Teks
The Annals of Dentistry. University of Malaya,
Majalah, Jurnal, Buletin
Artikel Jurnal
Scully, Crispian, author
Churchill Livingstone, Elsevier, 2010
Buku Teks