Lancaster, F. Wilfrid
University of Illinois, 1998
Buku Teks
Lancaster, F. Wilfrid
Facet Publishing, 2003
Buku Teks
Cleveland, Donald B.
Libraries Unlimited, 2013
Buku Teks
Cleveland, Donald B.
Libraries Unlimited, 2001
Buku Referensi
Stephens, J.
British Library Board, 1983
Buku Referensi