11. How it's done: an invitation to social research Adler, Emily Stier. Belmont, CA : Thomson/Wadsworth, c2008. SOC221
12. Social research methodology: a critical introduction Gomm, Roger. Basingstoke [England] ; Palgrave Macmillan, 2008. SOC221
13. Qualitative inquiry & research design: choosing among five approaches Creswell, John W. Thousand Oaks : Sage Publications, c2007. SOC221
