[publisher not identified], [date of publication not identified]
Naskah
[publisher not identified], [date of publication not identified]
Naskah
Artikel Jurnal
Sonny Feisal Rinaldi, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2001
UI - Tesis (Membership)
Nasution, Samuel R.B., author
Fakultas Teknik Universitas Indonesia, 1996
UI - Skripsi (Membership)