Hummel, James A.
Addison-Wesley, 1967
Buku Teks SO
Williamson, Richard E.
Prentice-Hall, 1972
Buku Teks SO
Spiegel, Murray R.
McGraw-Hill, 1981
Buku Teks SO
Spiegel, Murray R.
McGraw-Hill, 2009
Buku Teks SO
Fisher, Robert C.
Dickenson Publishing Company, Inc., 1970
Buku Teks SO