Nielsen, L. (2009). IMF Working Paper: Global Relative Poverty. USA: INTERNATIONAL MONETARY FUND. doi: https://doi.org/10.5089/9781451872408.001
Nielsen, Lynge. IMF Working Paper: Global Relative Poverty. USA: INTERNATIONAL MONETARY FUND, 2009. https://doi.org/10.5089/9781451872408.001 Web.
Nielsen, Lynge. IMF Working Paper: Global Relative Poverty, (USA: INTERNATIONAL MONETARY FUND, 2009)doi: https://doi.org/10.5089/9781451872408.001
Nielsen, L. (2009). IMF Working Paper: Global Relative Poverty, USA: INTERNATIONAL MONETARY FUND. Available From: China<https://doi.org/10.5089/9781451872408.001> [Accessed 22 August 2019]