Phares Odaffer, Randall Charles, Thomas Cooney, John Dossey, Jane Schielack
Pearson Addison Wesley, 2008
Buku Teks SO
Krause, Eugene F.
Prentice-Hall, 1978
Buku Teks SO
Devine, Donald F.
John Wiley & Sons, 1983
Buku Teks SO
Garstens, Helen L.
Macmillan, 1969
Buku Teks SO
Bennett, Albert B.
McGraw-Hill , 2001
Buku Teks SO