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
Rowley, Jennifer
Clive Bingley, 1988
Buku Teks
Buchanan, Brian
Clive Bingley & Linnet Books, 1976
Buku Referensi