Morris, Iain (10. 3. 2014). „A Bigger Prize review – the price we pay for competition”. Books. The Guardian (UK изд.). Guardian News and Media Limited. ISSN0261-3077. Приступљено 16. 3. 2014. „Margaret Heffernan's brave study shows how the competitive instinct can be bad for us in all walks of life, from sport to finance”
Morris, Iain (10. 3. 2014). „A Bigger Prize review – the price we pay for competition”. Books. The Guardian (UK изд.). Guardian News and Media Limited. ISSN0261-3077. Приступљено 16. 3. 2014. „Margaret Heffernan's brave study shows how the competitive instinct can be bad for us in all walks of life, from sport to finance”