National intelligence service needs to be free of political influences
 Artikel Jurnal
Lane, Max
Decentralization & its discontents: an essay on class, political agency, and national perspective in Indonesian politics
Institute of Southeast Asian Studies , 2014
 eBooks
Hawley, Amos H.
Human ecology : a theoretical essay
The University of Chicago Press, 1986
 Buku Teks
Locke, John
An essay concerning human understanding
J.M. Dent & Sons, 1947
 Buku Teks
Locke, John
An essay concerning human understanding
Hackett Publishing Company, Inc., 1996
 Buku Teks