Penegakan hukum dan peran program perlindungan saksi
 Artikel Jurnal
Program budgeting: program analysis and the federal budget / editor, David Novick
Harvard University Press, 1967
 Buku Teks
Fyfe, Nicholas R
Perlindungan terhadap saksi terintimidasi
Elsam, 2006
 Buku Teks
Portfolio, program, and project management in the pharmaceutical and biotechnology industries / edited by Pete Harpum
John Wiley & Sons, 2010
 eBooks
Computer-assisted test construction/Editor Gerald Lippey
Educational Technology , 1974
 Buku Teks