Liberal Arts Press,, 1959
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Bird, Isabella Lucy
Yonsel University Press, 1970
Buku Teks
Rifai Septia Nurdin, author
Fakultas Ilmu Sosial dan Ilmu Politik Universitas Indonesia, 2022
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Bell, R.P.
Cornell University, 1959
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Watt, William Montgomery, author
INIS, 1998
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