CDKN,
Majalah, Jurnal, Buletin
Saeed, Saqib, author
Information Science Reference, 2013
Buku Teks
Myers, John G., author
Prentice-Hall, 1980
Buku Teks
editors, Douglas J Loveless, Bryant Griffith, Margaret E BĂ©rci, Evan Ortlieb, Pamela M Sullivan
Information Science Reference (an imprint of IGI Global), 2014
Buku Teks
Gabain, Alexander von, editor
[, Springer], 2012
eBooks