Erlita Nur Anggraeni, author
Fakultas Hukum Universitas Indonesia, 2016
UI - Tesis Membership
Howard Tumber, editor
Routledge, 2000
Buku Teks
Covey, Stephen R., author
A Fireside Book Simon & Schuster , 1989
Buku Teks
Dea Amelia, author
Universitas Indonesia, 2011
UI - Skripsi Open
Artikel Jurnal