El-Reedy, Mohamed, author
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Buku Teks
Paul, Dan, author
John Wiley & Sons, 2003
Buku Teks
Stacey, Ralph D., author
Financial Times Prentice Hall, 2011
Buku Teks
Project Management Institute, 2013
Buku Teks
Dess, Gregory G., author
McGraw-Hill/Irwin, 2004
Buku Teks