Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2005
UI - Skripsi (Membership)
Robbins, Harvey.
Berrett-Koehler, 2000
Buku Teks
Zweig, Jason
Simon & Schuster, 2007
Buku Teks
Collins, V.D., author
J.B. Lippincott, 1935
Buku Teks
C.S. Hammond & Company
C.S. Hammond & Company, 1958
Buku Teks