Cox, David A.
John Wiley & Sons, 2012
Buku Teks SO
Borevich, Z.I.
Academic Press, 1966
Buku Teks SO
edited by A.P. Huhn and E.T. Schmidt
North-Holland Publishing, 1976
Buku Teks SO
Kamke, E.
Dover, 1950
Buku Teks SO
Kyburg, Henry E.
Prentice-Hall, 1969
Buku Teks SO