Adler, Mortimer Jerome, 1902-2001
The difference of man and the difference it makes
Holt, Rinehart and Winston, 1967
 Buku Teks SO
Using public libraries: what makes a difference
 Artikel Jurnal
Deleuze, Gilles
Difference and repetition
Continuum, 2007
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Cohen, Robin
Encountering Difference
John Wiley & Sons, 2016
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Identity and difference
edited by Kathryn Woodward
The Open University, 1997
 Buku Teks SO