1. Research methodology : by Kumar, Ranjit. Publication: SAGE Publications Ltd. 2018 . 528 pages Date:2018 Availability: Copies available: ციფრული არქივი - Digital Archive (1),
2. Research Methodology : A Step-by-Step Guide for Beginners. by Kumar, Ranjit Publication: Los Angeles.: SAGE, 2010 . 441p. Date:2010 Availability: Copies available: ციფრული არქივი - Digital Archive (1), No cover image available
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