Engler, Richard E.
The challenge of diversity
Harper & Row, 1964
Buku Teks SO
Myrdal, Gunnar, 1898-
Challenge to affluence
Pantheon Books, 1963
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Janda, Kenneth
The challenge of democracy : government in America 1999-2000 update
Houghton Mifflin, 2000
Buku Teks SO
Einstein, Mara
Media diversity
Lawrence Erlbaum, 2004
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Zinn, Maxine Baca
Diversity in families
Harper Collins, 1987
Buku Teks SO