Artikel Jurnal
Damanik, Mochamad Yakinsyah, author
Universitas Indonesia, 1986
UI - Skripsi (Membership)
Natalia Kristin Ardianti, author
Universitas Indonesia, 2006
UI - Tesis Membership
Hadari Djenawi Tahir, author
Alumni, 1981
Buku Teks
M. Sholehuddin, author
RajaGrafindo Persada, 2007
Buku Teks