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VGM Career Books,, 2001
Buku Teks
Waldrep, Lee W., author
John Wiley & Sons, 2010
Buku Teks
Waldrep, Lee W., author
John Wiley & Sons, 2010
Buku Teks
edited by John Straton-Ferrier
PAN Books, 1970
Buku Teks
Gould, Jay R., author
VGM Career Horizons, 1994
Buku Teks