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Gilbert, Dorothy B.
R.R.Bowker, [date of publication not identified]
Buku Teks
Trump, Ivanka, 1981-
Penguin, 2017
Buku Teks
Domhoff, G. William
McGraw-Hill, Higher Education, 2010
Buku Teks SO
The A.N. Marquis, 1966
Buku Referensi