1. Research methodology: a practical and scientific approach Boca Raton : CRC Press, Taylor & Francis Group, [2019]. DSA411
2. Research methodology: a practical and scientific approach Boca Raton : CRC Press, Taylor & Francis Group, 2019. DSA411
3. Introducing research methodology: a beginner's guide to doing a research project Flick, Uwe, 1956- London : SAGE Publications Ltd, [2015] ENG250
