Driver, R., Squires, A., Rushworth, P. and Wood-Robinson, V. (1994) Making Sense of Secondary Science. London: RoutledgeFalmer.
Johnston, J. (2009) ‘Observation as an important enquiry skill’, Primary Science
, no. 106, pp. 15–17. Hatfield: Association for Science Education. Available from: http://www.ase.org.uk/ journals/ primary-science/ 2009/ 01/ 106/ 1086/ PSR106Jan-Feb2009p15.pdf [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]
(accessed 6 August 2014).