Artikel Jurnal
Treshow, Michael, author
McGraw-Hill, 1976
Buku Teks
edited by Jonathan Rigg
Archipelago Press, 1996
Buku Teks
Essential National Health Research
UNDP, 1991
Buku Teks
James A. Johnson
Southern Public Administration Education Foundation, Inc, 1990
Majalah, Jurnal, Buletin