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Institute for Business Planning, 1981
Buku Teks
edited by Claire A. Hill, James L. Krusemark
UK Edward Elgar Publishing, 2016
Buku Teks
Kintner, Earl W.
Macmillan Publishing Co.Inc., 1973
Buku Teks
Cambridge Univ press, 1991
Buku Teks
Oesterle, Dale A.
West Publishing Co., 1991
Buku Teks