Solomons, T.W. Graham
John Wiley & Sons, 1988
Buku Referensi
Carey, Francis A., 1937-
McGraw-Hill , 2003
Multimedia
Atkins, Robert C. (Robert Charles), 1944-
McGraw-Hill, 2002
Buku Teks SO
Baker, A. David
West Publishing, 1992
Buku Teks SO
Barry, Roger D.
Bobbs Merrill, 1975
Buku Teks SO