Nehru, Neena.
External Publicity Division, 1993
Buku Teks
Edgell, Stephen, author
Sage , 2012
Buku Teks
Snedaker, Susan, author
Syngress, 2014
eBooks
Feather, John
Library Association Publishing , 1996
Buku Teks
Feather, John
Library Association Publishing , 1998
Buku Teks