edited by Kieran Walshe and Judith Smith
McGraw-hill Open Univer, 2011
Buku Teks
Kogan Page, 1997
Buku Referensi
Haimann, Theo
The Catholic Health Association of the United States, 1989
Buku Teks
Shirley, David
CRC Press Taylor &Francis Group, 2011
Buku Teks
Olden, Peter C.
AUPHA Press, 2011
Buku Teks