Your call. All three = best. If you need a soft option then either do the required only, or in lieu of that, both the recommended ones.
Smith, M. K. (2001) ‘Chris Argyris: theories of action, double-loop learning and organizational learning’, the encyclopedia of informal education, www.infed.org/thinkers/argyris.htm. Last update: May 29, 2012. (PDF copy)
Recommended (and easier)
Miles, Adrian. “Blogs in Media Education: A Beginning.” Australian Screen Ed 41 (2006): 66–9. Print. (http://vogmae.net.au/vlog/research/network-literacies/blogs-in-media-education/) (PDF copy)
Mason, John. Researching Your Own Practice: The Discipline of Noticing. London: Routledge, 2002. Print. (PDF copy)