6. RA Stanier, PLE diagram - http :// socialsoftware.blogsome.com /2007/04/23/online- lecture - on -e-learning-20/
7. AJ Cann, PLE Presentation - http :// www.microbiologybytes.com / tutorials / ple /ple5. html
8. Martin Weller - My personal work/leisure/learning environment - http :// nogoodreason.typepad.co.uk / no_good_reason /2007/12/ my -personal- wor.html