Dewi Ratna Wulan, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2003
UI - Tesis (Membership)
Hanke, John E., author
Pearson - Prentice Hall, 2009
Buku Teks
Hanke, John E., author
Prentice Halls, 2001
Buku Teks
Hanke, Jonh E., author
Pearson Prentice Hall, 2005
Buku Teks
Bratt, Elmer C., author
McGraw-Hill, 1958
Buku Teks