Loury, Glenn C.
Buku Teks
Lipset, Seymour Martin
University of California, 1967
Buku Teks SO
Davies, Ioan
Pall Mall Press, 1970
Buku Teks SO
Matras, Judah
Prentice-Hall, 1975
Buku Teks SO
Sims, Jennifer Patrice
Emerald Publishing Limited, 2020
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