Jacobin Magazine. Retrieved November 10, 2015. ↑ "Ann Leckie on David Graeber's Debt: The First 5000 Mistakes: Handling the Sumerian Evidence Smackdown", by Bradford DeLong, at Bradford-Delong.com; published December 29, 2014; retrieved April 13, 2017 ↑ "Debt", by Ann Leckie, at AnnLeckie.com; published February 24, 2013; retrieved April 13, 2017