Epstein, Adam, author
Pearson/Prentice Hall, 2006
Buku Teks
Aldrich, James R., author
McGraw-Hill, 1996
Buku Teks
Jimmy Daniel Berlianto Oley, author
Komisi Pemberantasan Korupsi, 2018
Artikel Jurnal
Helfert, Erich A., author
Erlangga, 1997
Buku Referensi
Stubbs, Amanda, author
Thomas Telford, 1998
Buku Teks