Abell, D. F. (1993). Managing with dual strategies: Mastering the present, preempting the future. Free Press.
Lua i Stíl Chicago (17ú heag.)Abell, Derek F. Managing with Dual Strategies: Mastering the Present, Preempting the Future. New York: Free Press, 1993.
Lua MLA (9ú heag.)Abell, Derek F. Managing with Dual Strategies: Mastering the Present, Preempting the Future. Free Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.