Sitorus, Winner, author
Universitas Indonesia, 1998
UI - Tesis (Membership)
Hadimulyo
Elsam, 1997
Buku Teks
Sudiarto, author
RajaGrafindo Persada, 2004
Buku Teks
Universitas Indonesia, 1997
UI - Skripsi (Membership)
Irfan, author
Universitas Indonesia, 2003
UI - Tesis (Membership)