Gorman, G.E., author
Hans Zell Publishers, 1992
Buku Referensi
Lancaster, F. Wilfrid, author
University of Illinois, 1998
Buku Teks
Lancaster, F. Wilfrid, author
Facet Publishing, 2003
Buku Teks
Cleveland, Donald B., author
Libraries Unlimited, 2013
Buku Teks
Cleveland, Donald B., author
Libraries Unlimited, 2001
Buku Referensi