Kurihara, Kenneth K., author
Allen & Unwin, 1951
Buku Teks
Kurihara, Kenneth K., author
W.W. Nortorn, 1950
Buku Teks
Gapinski, James H., author
McGraw-Hill , 1982
Buku Teks
Nainggolan, Alexander Hamonangan, author
Departemen Ilmu Politik FISIP UI, 2017
Artikel Jurnal
edited by Almarin Phillips and Oliver E. Williamson
University of Pennsylvania Press , 1967
Buku Teks