edited by Cath Rogers-Clark
Maclennan + Petty , 1998
Buku Teks
McMurray, Anne, author
Churchill Livingstone , 1990
Buku Teks
World Health Organization
World Health Organization, 1990
Buku Teks
Hanoi, British Council
Buku Referensi
Youngkin, Ellis Quinn, author
Appleton & Lange , 1998
Buku Teks