Harold
Princeton University Press, 1965
Buku Teks
Van der Ryn, Sim
Island Press, 1996
Buku Teks
Andri Ramawan Adipura, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Skripsi (Membership)
Muhammad Al Kahfi, author
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UI - Skripsi (Membership)
Cox, C. Barry, author
John Wiley & Sons, 2010
Buku Teks