S. Prajudi Atmosudirdjo, author
Februari, 1973
Buku Teks
Cayer, N. Joseph, author
Thomson wadsworth, 2004
Buku Teks
edited by Massimo Sargiacomo
McGraw-Hill, 2013
Buku Teks
Baker, David, author
Chandos Publishing, 2007
Buku Teks
Surbakti, Ramlan, author
Ministry of Home Affairs R.I., 2000
Buku Teks