1. Bacon F. Novum Organum. Aphorism LIV. The Collected Works of Francis Bacon. Spedding J, Ellis RL, Heath DD, editors. London: Longmans, 1857–74.
2. Smagorinsky P. The method section as conceptual epicenter in constructing social science research reports. Written Commun. 2008;25(3):389–411.
3. UK Department for International Development. Assessing the strength of evidence. How-to note for policymakers. 2014. https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/291982/HTN-strngth-evidence-march2014.pdf . Accessed 11 Oct 2015.
4. International Inititative for Impact Evaluation (3ie). Systematic Reviews in international development. http://www.3ieimpact.org/evidence/systematic-reviews/ . Accessed 11 Oct 2015.
5. Economic and Social Research Council. Synthesis. http://www.esrc.ac.uk/public-engagement/public-dialogues/research-syntheses/ . Accessed 11 Oct 2015.