Pillkahn, U. (2008). Using Trends and Scenarios as Tools for Strategy Development. Simon & Schuster.
Chicago Style aipamenaPillkahn, Ulf. Using Trends and Scenarios as Tools for Strategy Development. London: Simon & Schuster, 2008.
MLA aipamenaPillkahn, Ulf. Using Trends and Scenarios as Tools for Strategy Development. Simon & Schuster, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.