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UNESCO, 1979
Buku Teks
Brubaker, C. William, author
McGraw-Hill, 1998
Buku Teks
Matei Candea
Routledge, 2018
Buku Teks
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Buku Teks
Starko, Alane Jordan, author
Lawrence Erlbaum Associates, 2005
Buku Teks