DeMarco, Tom
Dorset House Publishing, 1999
Buku Teks
Skarzynski, Peter, author
Havard Business Press, 2008
Buku Teks
Theresia Oktavina, author
2018
UI - Tesis (Membership)
Floyd, Raymond C., author
CRC Press, Taylor & Francis Group, 2008
Buku Teks
Tiem, Darlene Van, author
American Society for Training & Development, 2006
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