Moore, Gary A., author
South-Western Publishing, 1987
Buku Teks
Butler, Henry N., author
South-Western Publishing, 1987
Buku Teks
Kubasek, Nancy K., author
Pearson Prentice Hall, c2009
Buku Teks
Whitman, Douglas
Random House , 1985
Buku Teks
Tucker, Edwin W.
Irwin, 1992
Buku Teks