Gup, B. E. (1980). Guide to strategic planning. McGraw-Hill.
Cita Chicago (17th ed.)Gup, Benton E. Guide to Strategic Planning. New York: McGraw-Hill, 1980.
Cita MLA (9th ed.)Gup, Benton E. Guide to Strategic Planning. McGraw-Hill, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.