Jackson, H. K., & Frigon, N. L. (1996). Achieving the competitive edge: A practical guide to world-class competition. Wiley.
Lua i Stíl Chicago (17ú heag.)Jackson, Harry K., agus Normand L. Frigon. Achieving the Competitive Edge: A Practical Guide to World-class Competition. New York: Wiley, 1996.
Lua MLA (9ú heag.)Jackson, Harry K., agus Normand L. Frigon. Achieving the Competitive Edge: A Practical Guide to World-class Competition. Wiley, 1996.
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