Balck, JT
McGraw-Hill, 1991
Buku Teks
Bessant, J.R.
UK NCC Blackwell, 1991
Buku Teks
Scheer, August-Wilhelm
Springer-Verlag, 1994
Buku Teks
Gross, John M.
[American Management Association, ], 2003
eBooks
Hendri
Fakultas Teknik Universitas Indonesia, 1996
UI - Skripsi Membership