Dunfee, Thomnas W.
Prentice-Hall, 1983
Buku Teks
Jennings, Marianne Moody
South Western Cengage Learning, 2012
Buku Teks
Buttler, Henry N.
South-Western Publishing Co., 1987
Buku Teks
Lieberman, Jethro K.
Harcourt Brace Jovanovic, 1989
Buku Teks
Meiners, Roger E.
Thomson/West , 2006
Buku Teks