Oskamp, Stuart
Attitudes and opinions
Lawrence Erlbaum , 2005
 Buku Teks
Keesing, Roger M.
New perspectives in cultural anthropology /Roger M. Keesing, Felix M. Keesing
Holt, Rinchart and Winston, 1971
 Buku Teks
Savira Rahmayani Faturahman
Fethullah Gülen sebagai tokoh sentral dalam gerakan Fethullah Gülen
Fakultas Ilmu Pengetahuan dan 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