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Springer, 2009
Buku Teks
Kay, Robert, author
Routledge, 2005
Buku Teks
by Lincoln D. Cathers...[et al.]; editor, J.F. Peel Brahtz
John Wiley, 1972
Buku Teks
Beatley, Timothy, author
University California Press, 2003
Buku Teks
Riri Oktaviani, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2013
UI - Tesis (Membership)