edited by Kieran Walshe and Judith Smith
Open University Press, 2006
Buku Teks
edited by Kieran Walshe and Judith Smith
McGraw-hill Open Univer, 2011
Buku Teks
Shirley, David, author
CRC Press Taylor &Francis Group, 2011
Buku Teks
Olden, Peter C., author
AUPHA Press, 2011
Buku Teks
Kogan Page, 1997
Buku Referensi