MACKENZIE, A. (1989). Time For success: Agoal getter'strategy. Mc Graw Hill inc.
Lua i Stíl Chicago (17ú heag.)MACKENZIE, Alec. Time For Success: Agoal Getter'strategy. New York: Mc Graw Hill inc, 1989.
Lua MLA (9ú heag.)MACKENZIE, Alec. Time For Success: Agoal Getter'strategy. Mc Graw Hill inc, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.