Halpin, Daniel W.
John Wiley & Sons, 1980
Buku Teks SO
compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks
Griffith, Alan
Longman, 2000
Buku Teks
Morgan, D. Bryan
[RIBA enterprises, ], 2005
eBooks
O`Brien, James J.
Primavera System, 2005
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