Evans, Norman, 1923-, author
Routledge, 2001
Buku Teks
edited by Heather Fry, Steve Ketteridge and Stephanie Marshall
Routledge, 2009
Buku Referensi
Day, Barbara
Maxwell Macmillan, 1994
Buku Teks
Barbera, Elena, author
Information Science Reference, 2014
Buku Referensi
Bates, Tony, 1939-, author
Jossey-Bass, 2011
Buku Teks