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Buku Teks
Keating, Sarah B, author
Lippincott Williams & Wilkins, 2006
Buku Teks
Adi Kurnia, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Tesis (Membership)
McNeil, John D., author
Litle Brown, 1977
Buku Teks
Davies, Ivor K., author
McGraw-Hill, 1976
Buku Teks