Greeley, Andrew M.
John Wiley & Sons, 1974
Buku Teks SO
Korea Advanced Institute of Science and Technology,
Majalah, Jurnal, Buletin
Bulkis Kanata
Faculty of Engineering, Universitas Indonesia, 2014
Artikel Jurnal
Maslow, Abraham H.
Harper & Row, 1966
Buku Teks SO
Thomas Telford, 1996
Buku Teks SO