Daily, James W.
Addison-Wesley Publishing Company, INC, 1966
Buku Teks SO
editor, Victor L. Streeter
McGraw-Hill, 1961
Buku Referensi
Warsi, Z.U.A.
CRC Press, 1999
Buku Teks SO
edited by Jaime Klapp, Anne Cros, Oscar Velasco Fuentes, Catalina Stern, Mario Alberto Rodriguez Meza
Springer, 2012
eBooks
Hughes, William F.
McGraw-Hill, 1967
Buku Teks SO