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Buku Teks
Time-Life Books, 1971
Buku Referensi
Keithly, David M., author
Westview Press, 1986
Buku Teks
Henderson, Hubert, author
Nisbet, 1954
Buku Teks
Budi Utomo, author
Lembaga Demografi Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1979
Buku Teks