edited by Michael Shayer
Open University Press, 2002
Buku Teks
Driscoll, Marcy P, author
Pearson Allyn and Bacon, 2005
Buku Teks
Burke, Kay, author
Hawker Brownlow Education, 1999
Buku Teks
edited by Robin A. Murphy and Robert C. Honey
Wiley-Blackwell, 2016
Buku Teks
editor, Dirk Ifenthaler, Deniz Eseryel, Xun Ge
Springer, 2012
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