Witt, S. (1983). How to be twice as smart: Boosting your brain power and unleashing the miracles of your mind. Rewards Books.
Citace podle Chicago (17th ed.)Witt, Scott. How to Be Twice as Smart: Boosting Your Brain Power and Unleashing the Miracles of Your Mind. West Nyack, N.Y: Rewards Books, 1983.
Citace podle MLA (8th ed.)Witt, Scott. How to Be Twice as Smart: Boosting Your Brain Power and Unleashing the Miracles of Your Mind. Rewards Books, 1983.
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