Elo and Kyngäs has a 2008 “masterpiece“ on qualitative content analysis... I highly recommend this paper. Search RG or Google Scholar and you will find it...
The illustrations/guidance/process as per the following publications may further help.
Bowen, G. A. (2009) Document analysis as a qualitative research method, Qualitative research journal, 9, 2, pp. 27-40.
Jupp, V. (2006) The Sage Dictionary of Social Research Methods. London: SAGE Publications Ltd. (See: Document Analysis, pp. 79-81).
Miller, F. A. and Alvarado, K. (2005) Incorporating documents into qualitative nursing research, Journal of Nursing Scholarship, 37, 4, pp. 348-353. (See: A Framework for Analyzing Documents, pp. 350-353).
O'Leary, Z. (2004) The Essential Guide To Doing Research. London: SAGE Publications Ltd. (See: The steps in Document Analysis, p. 179).
Prior, L. (2003) Using Documents in Social Research. London: SAGE Publications Ltd.