Ingram, Jefferson L., author
Pearson/Prentice Hall, 2005
Buku Teks
Gordon, Gary R. , author
Elsevier, 2012
Buku Teks
Carsten Stahn, editor
Oxford Univesity Press, 2015
Buku Teks
Bachman, Ronet, author
Pine Forge Press, 2003
Buku Teks
Bachman, Ronet
2003
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