Sekhar, R.C.
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Buku Teks
Desjardins, Joseph, author
McGraw-Hill, 2014
Buku Teks
Jasmine Azura Alhabsyi, author
UI - Makalah dan Kertas Kerja
Pearson Education , 2005 2005
Multimedia
Jackson, Jennifer
Blackwell Publishers, 1996
Buku Teks