Tharpe, Nell L., author
Jones and Bartlett Publishers, 2006
Buku Teks
Edge, Valerie
Mosby , 1994
Buku Teks
Bates, Barbara, author
J.B. Lippincott, 1991
Buku Teks
Delp, Mahlon
Philldedelphia: Wb sounder company , 1981
Buku Teks
American Institute of Certified Public Accounts, 1983
Buku Teks