Ingram, Robert W., author
South-Western College 2001, 2001
Buku Teks
Martin, Mearle, author
Prentice-Hall, 2003
Buku Teks
Romney, Marshall B., author
Prentice-Hall, 2003
Buku Teks
Wild, John J., author
Irwin Mcgraw-Hill, 2000
Buku Teks
Bodnar, George H., author
Prentice-Hall, 1998
Buku Referensi