Anthonio akkermans, Peter G. Drake, Bill Mattos, andy Middleton
Hermes House, 2011
Buku Referensi
edited by Karen S. Cosby, John L. Kendall
Wolters Kluwer, 2014
Buku Teks
Hirko, Buff, author
[American Library association, American Library association], 2004
eBooks
Pyzdek, Thomas, author
McGraw-Hill, 2010
Buku Teks
Pyzdek, Thomas, author
McGraw-Hill, 2003
Buku Referensi