Hutabarat, Peiza, author
Fakultas Hukum Universitas Indonesia, 2004
UI - Tesis Membership
Smerdon, Richard, author
Sweet and Maxwel, 2007
Buku Teks
Solomon, Jill, author
Wiley, 2013
Buku Teks
Djokosantoso Moeljono, author
Elex Media Komputindo, 2005
Buku Teks
Davvide Chandra, author
2014
UI - Skripsi (Membership)