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McGraw-Hill, 1984
Buku Teks
edited by Arthur J. Reynolds, Arthur J. Rolnick, Judy A. Temple
Cambrigde University Press , 2014
Buku Teks
Alexander, Rudolph, author
Thomson Brooks/Cole, 2003
Buku Teks
Annisah, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2014
UI - Tesis (Membership)
Lafrance, Arthur B.
West Publishing Company, 1979
Buku Teks