Eccher, Clint, author
Charles River Media, 2002
Buku Teks
Poulter, Alan, author
Library Association, 1999
Buku Teks SO
Hjelm, Johan
John Wiley & Sons, 2001
Buku Referensi
Arnoldus, B.J., author
Atlantis Press, 2012
eBooks
Good Jeff, author
Cambridge University Press, 2016
Buku Teks SO