Lucas, Henry C., author
McGraw-Hill, 1986
Buku Teks
McLeod, Raymond, author
Macmillan, 1993
Buku Teks
McLeod, Raymond, author
Prentice-Hall, 1995
Buku Teks
McLeod, Raymond, author
Macmillan, 1990
Buku Teks
Olson, David Louis, author
MCGraw-Hill , 2004
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