Hammer, Mark J.
Prentice-Hall, 2004.
Buku Teks
Mcgraw-Hill, 1987
Buku Referensi
Shammas, Nazih K., author
John Wiley & Sons, 2016
Buku Teks
Prihutami Rista Hermawati, author
Fakultas Teknik Universitas Indonesia, 2013
UI - Skripsi Membership
Kalbermatten, John M.
The World Bank, 1980
Buku Teks