Hancock, Dora, author
Chapman and Hall, 1994
Buku Teks
Nightingale, Kath, author
Prentice-Hall, 2002
Buku Teks
edited by Emile Woolf
Pitman, 1986
Buku Teks
Harcourt Brace Jovanovich, 1982
Buku Teks
Summa, Don J.
American Institute of Certified Public Accountants, [date of publication not identified]
Buku Teks