Addison-Wesley , 1985
Buku Teks
Larson, Harold J.
John Wiley & Sons, 1975
Buku Teks
Levine, David M., 1946-, author
Prentice-Hall, 1999
Buku Teks
McClave, James T., author
Dellen Publishing, 1979
Buku Teks
Hays, William L., author
Harcourt Brace Colege, 1994
Buku Teks