Shapiro, Eli
Holt, Rinehart and Winston,Inc., 1968
Buku Teks
Neave, Edwin H.
Prentice-Hall, 1981
Buku Teks
Brigham, Eugene F., 1930-
South-Western, 2008
Buku Teks
Brigham, Eugene F., 1930-
South-Western, 2014
Buku Teks
Brigham, Eugene F., 1930-
Dryden Press, 1985
Buku Teks