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A concise introduction to mixed methods research מאת Creswell, John W.

Automated data collection with R a practical guide to Web scraping and text mining מאת Munzert, Simon

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Web survey methodology מאת Callegaro, Mario, Lozar Manfreda, Katja, Vehovar, Vasja

Focus groups theory and practice מאת Stewart, David W., Shamdasani, Prem N.

Managing and sharing research data a guide to good practice מאת Corti, Louise, Eynden, Veerle van den, Bishop, Libby, Woollard, Matthew

Qualitative methodology a practical guide