Intner, Sheila S., author
Libraries Unlimited, 1993
Buku Teks
McMenemy, David, author
Facet, 2009
Buku Teks
Brophy, Peter, author
Facet, 2005
Buku Teks
Smart, Huw, author
Oxford University Press, 2006
Buku Referensi
Smart, Huw, author
Oxford University Press, 2006
Buku Referensi