MACKENZIE, A. (1989). Time For success: Agoal getter'strategy. Mc Graw Hill inc.
Cita Chicago (17th ed.)MACKENZIE, Alec. Time For Success: Agoal Getter'strategy. New York: Mc Graw Hill inc, 1989.
Cita MLA (9th ed.)MACKENZIE, Alec. Time For Success: Agoal Getter'strategy. Mc Graw Hill inc, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.