Pessin, Allan H.
Business One Irwin, 1990
Buku Referensi
Merrett, A.J.
Longman , 1963
Buku Teks
Ripley, William Z.
Little, Brown, and Company, 1927
Buku Teks
Downes, John
Barron's Educational Series, 1998
Buku Referensi
Berry, Michael A.
Dryden Press, 1990
Buku Teks