1
Hart K. Chapter 7, Ratio and proportion. In: Children’s understanding of mathematics, 11-16. London: : John Murray 1981. 88–97.https://contentstore.cla.co.uk/secure/link?id=8c863559-bf1d-e611-80bd-0cc47a6bddeb
2
Butt G. MasterClass in geography education: transforming teaching and learning. London: : Bloomsbury Academic 2015.
3
Jones M. The handbook of secondary geography. Sheffield: : Geographical Association 2017.
4
Lambert D, Jones M. Debates in geography education. London: : Routledge 2013.
