1. Key Methods Used in Qualitative Document Analysis
2. Askling, B., T. Dahl, K. Heggen, L. I. Kulbrandstad, T. Lauvdal, S. Mausethagen, L. Qvortrup, et al. 2016. Om Lærerrollen. Et Kunnskapsgrunnlag. Bergen: Fagbokforlaget. https://oda.oslomet.no/oda-xmlui/bitstream/handle/20.500.12199/3010/Om%20laererrollen.pdf?sequence=6&isAllowed=y.
3. Becher, T., and P. Trowler. 2001. Academic Tribes and Territories. England: McGraw-Hill Education.
4. Consistency of results regarding teacher effects across subjects, school levels, outcomes and countries
5. Bogdan, R., and S. K. Biklen. 2007. Qualitative Research for Education: An Introduction to Theory and Methods. Hoboken, NJ: Pearson A & B.