Rotman, Morris B.
VGM Career Books,, 2001
Buku Teks
Waldrep, Lee W.
John Wiley & Sons, 2010
Buku Teks
Waldrep, Lee W.
John Wiley & Sons, 2010
Buku Teks
Sacks, Terrence J.
VGM Career Harizons , 1993
Buku Teks
Gould, Jay R.
VGM Career Horizons, 1994
Buku Teks