Luard, Evan, author
Macmillan, 1990
Buku Teks
Tomasson, Richard F., author
Random Home, 1970
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper Business, 1993
Buku Teks
Abram Stephen, author
[American Library association, American Library association], 2007
eBooks
Organisation for economic Co-operations and Development, 1971
Buku Teks