Artikel Jurnal
Lowi, Theodore J.
Basic books, 1971
Buku Teks
by J.S.G. Wilson ... [et al.]
Organization for Economic Cooperation and Development , 1967
Buku Teks
Mohammad Gardatama Atmadibrata, author
Universitas Indonesia, 2014
UI - Skripsi (Membership)
Peter Cook [and others], editor
Wiley-Academy, 2001
Buku Teks