Capezio, Peter J., 1947-, author
Manager's guide to business planning
McGraw-Hill, 2010
 Buku Teks
Hussey, David E., author
Corporate planning: theory and practice
Pergamon Press, 1976
 Buku Teks
Dauten, Carl A.
Business cycles and forecasting / Carl A. Dauten, Lloyd M. Valentine
South-Western Publishing Co., 1978
 Buku Teks
Valentine, Lloyd M.
Business cycles and forecasting/ Lloyd M. Valentine and Dennis F. Ellis
Ohio South-Western Pub. , 1991
 Buku Teks
Habbel, Rolf W., author
The Human Factor: management culture in a changing world
Palgrave Macmillan, 2002
 Buku Teks