Nicol, Rosemary
Vermilion, 1993
Buku Teks SO
Artikel Jurnal
Medical Journal of Indonesia, 12 (3) Juli September 2003: 194-198, 2003
Artikel Jurnal
Teoh, Eng Soon
Times Books International, 1999
Buku Teks SO
Whitehead, Malcolm
Churchill Livingstone , 1992
Buku Teks