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Buku Teks
Barnett, Raymod A., author
Pearson Education (Prentice Hall), 2008
Buku Teks
Prentice-Hall, 1970
Buku Teks
[T.t.] [t.p.] 1975
Buku Teks
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
Buku Teks