Robbins, A. (1988). Unlimited power: The new science of personal achievament. Simon and schuster.
Chicago-viite (17. p.)Robbins, Anthony. Unlimited Power: The New Science of Personal Achievament. London: Simon and schuster, 1988.
MLA-viite (9. p.)Robbins, Anthony. Unlimited Power: The New Science of Personal Achievament. Simon and schuster, 1988.
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