Peter, J. Paul, author
McGraw-Hill, 1999
Buku Teks
Howard, John A., author
Prentice-Hall, 1989
Buku Teks
Thorelli, H.B., author
Penguin Books, 1973
Buku Teks
Lane, Henry W., 1942-, author
Blackwell, 1997
Buku Teks
Hawkins, Del I., author
McGaw-Hill, 2010
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