Hi. The guide came into effect in September 2013. We have updated the guide to include examples of how to cite and reference a greater number of web sources and we’ve also updated it in line with the 2010 British Standard and various other guides on the web and in print. However, there is no definitive Harvard Guide (even the British Standard provides different examples of how to reference the same item). If you have been using our old Harvard guide, don’t panic, as the advice given in it was okay, but the new version is more up-to-date. It’s always worth checking with your subject tutor what they like you to use, as different subject disciplines have different referencing preferences.