Cassell, Catherine, and Gillian Symon. 2004. Essential Guide to Qualitative Methods in Organizational Research. London: SAGE.
Denzin, Norman K., and Yvonna S. Lincoln. 2011. The SAGE Handbook of Qualitative Research. 4th ed. Thousand Oaks, California: SAGE.
Silverman, David. 2010. Doing Qualitative Research: A Practical Handbook. 3rd ed. London: SAGE.
Silverman, David. 2013. A Very Short, Fairly Interesting and Reasonably Cheap Book about Qualitative Research. 2nd ed. London: Sage.
Symon, Gillian, and Catherine Cassell. 2012. Qualitative Organizational Research: Core Methods and Current Challenges. London: Sage.
Thorpe, Richard, Robin Holt, and MyiLibrary. 2008. The Sage Dictionary of Qualitative Management Research. Electronic resource. London: SAGE. https://ebookcentral.proquest.com/lib/nottingham/detail.action?docID=433627.