Little, Richard L.
McGraw-Hill, 1973
Buku Teks
Abington Publishing,
Majalah, Jurnal, Buletin
Gibson, Stuart W.
Mac Millan Press , 1994
Buku Teks
Elwin Aryo Mentaram
Fakultas Teknik Universitas Indonesia, 2013
UI - Skripsi (Membership)
Carr, Richard H.
Prentice-Hall, 1983
Buku Teks