O`Brien, James A., 1936-
Richard D. Irwin, 1975
Buku Teks
Norton`s, Peter
McGraw-Hill , 2006
Buku Teks
Davis, Gordon B.
McGraw-Hill, 1977
eBooks
Watson, Hugh J.
Businesss Publications , 1980
Buku Teks
Rosenberg, Jerry M.
John Wiley & Sons, 1993
Buku Referensi