Universitas Indonesia, 2007
UI - Skripsi (Membership)
Napitupulu, Amos, author
1988
UI - Skripsi (Membership)
Levine, Mark S., author
Sage, 1977
Buku Teks
Roy Kristiawan, author
Universitas Indonesia, 2011
UI - Tesis (Open)
Edwards, Allen L., author
W.H. Freeman, 1984
Buku Teks