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Buku Referensi
Cho, Hae-il
Dong-su-Munhak-sa, 1990
Buku Teks
Tocqueville, Alexis de
Oxford University Press, 1961
Buku Teks
Tocqueville, Alexis de
The New American Library, 1963
Buku Teks
Wilder
Gramedia, 1956
Buku Teks