Before revision: <ref> cite journal | author=Steven Ruggles |title=“The Minnesota Population Center Data Integration Projects: Challenges of harmonizing census microdata across time and URL journal='2005 Proceedings of the American Statistical Association Government Statistics Section, Alexandria, VA: American Statistical Association, |pages=pp.
After revision: cite journal | author=Steven Ruggles |title=“The Minnesota Population Center Data Integration Projects: Challenges of harmonizing census microdata across time and URL journal='2005 Proceedings of the American Statistical Association Government Statistics Section, Alexandria, VA: American Statistical Association, |pages=pp.