Doing a Systematic Review: A Student's Guide
Second Edition
Chapter 11. Reviewing Qualitative Evidence
Here are some other helpful materials for you to read through.
Enhancing transparency in reporting the synthesis of qualitative research
www.liverpool.ac.uk/media/livacuk/instituteofpsychology/Tong_2012.pdf
‘Trying to pin down jelly’ – Exploring intuitive processes in quality assessment
www.liverpool.ac.uk/media/livacuk/instituteofpsychology/Pinning,down,Jelly.pdf
A guide to writing a protocol for qualitative evidence synthesis
Enhancing Transparency in Reporting the Synthesis of Qualitative Research (ENTREQ) statement (a framework for reporting systematic reviews of qualitative health research)
http://bmcmedresmethodol.biomedcentral.com/articles/10.1186/1471-2288-12-181