Sitompul, Donny Mason, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2012
UI - Skripsi (Open)
edited by Allen M. Omoto
Lawrence Erlbaum Associates, 2005
Buku Teks
Wiley-Blackwell, 2010
eBooks
Tasker, Yvonne, 1964-, author
Wiley Balckwell, 2015
Buku Teks
Hampden-Turner, Charles
Anchor Press , 1974
Buku Teks