Tools:
Nvivo https://help-nv.qsrinternational.com/12/win/v12.1.45-d3ea61/Content/welcome.htm
Books:
Semantic Network Analysis Techniques for Extracting, Representing, and Querying Media Content, a book by Wouter van Atteveldt http://vanatteveldt.com/uploads/vanatteveldt_semanticnetworkanalysis.pdf