Post, Gerald V.
McGraw-Hill Irwin, 2003
Buku Teks SO
edited by Wolfgang Maass and Tobias Kowatsch
Springer, 2012
eBooks
Loomis, Charles P.
Van Nostrand Comp., 1967
Buku Teks SO
Kroenke, David M., 1946-
McGraw-Hill, 1994
Buku Teks SO
Lucas, Henry C.
Columbia University Press, 1974
Buku Teks SO