Holmes, Parker M.
South-Western Publishing Co., 1960
Buku Teks
Westing, John Howard
Prentice-Hall, 1957
Buku Teks
McNair, Malcolm P.
McGraw-Hill, 1949
Buku Teks
McNair, Malcolm P.
McGraw-Hill, 1956
Buku Teks
Aaker, David A.
John Wiley & Sons, 1995
Buku Teks