Jain, G. L. (1998). Research methodology: Methods, tools and techniques. Mangal Deep.
Chicago-čujuhus (17. p.)Jain, Gopal Lal. Research Methodology: Methods, Tools and Techniques. Jaipur: Mangal Deep, 1998.
MLA-čujuhus (9. p.)Jain, Gopal Lal. Research Methodology: Methods, Tools and Techniques. Mangal Deep, 1998.
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