Citra Umbara, 2009
Buku Teks
Surastini Fitriasih, author
1997
UI - Tesis (Membership)
Pulungan, Imanuel, author
Universitas Indonesia, 1985
UI - Skripsi (Membership)
Pangaribuan, Luhut M.P., author
Djambatan, 2006
Buku Teks
R. Soesilo, author
Politeia, 1995
Buku Teks