Gibson, E. Dana, author
South Western, 1957
Buku Teks
Bayu Yudianto, author
Fakultas Teknik Universitas Indonesia, 2002
UI - Skripsi (Membership)
edited by Senth Tyler
Kluwer Academic, 1991
Buku Teks
United Nation , 1983
Buku Teks
Robbins, P Stephen, author
Indeks, 2004
Buku Teks