Oskamp, Stuart
Attitudes and opinions
Lawrence Erlbaum , 2005
 Buku Teks SO
Savira Rahmayani Faturahman
Fethullah Gülen sebagai tokoh sentral dalam gerakan Fethullah Gülen
Fakultas Ilmu Pengetahuan Budaya Universitas Indonesia, 2011
 UI - Skripsi Open
Goodman, Paul S.
New perspectives on organizational effectiveness / Paul S. Goodman, Johannes M. Pennings, and associates
Jossey Bass Pub., 1981
 Buku Teks
Levin, Henry M.
Cost effectiveness: a primer. New perspectives in evaluation / Henry M. Levin
SAGE publications, 1983
 Buku Teks SO
Kehm, Barbara M
Higher education in Germeny : Developments, problems, and perspectives / By Barbara M. Kehm
Wittenberg and Bucharest, 1999
 Buku Teks