Universitas Indonesia, 1997
UI - Skripsi (Membership)
[publisher not identified], [date of publication not identified]
Buku Klasik
Wang, Thomas C., author
Erlangga, 1999
Buku Teks
Goodban, William T., author
Erlangga, 1995
Buku Teks
Francisco Budi Hardiman, 1962-, author
Gramedia, 2004
Buku Teks