Textbook of Medical Research Methodology authored by Dr. Rajvir Bhalwar. Click the link below:-

https://www.amazon.in/dp/9390612489/ref=redir_mobile_desktop?_encoding=UTF8&aaxitk=f676e2d8e95b00bfe3f1a3e35a11d4f3&hsa_cr_id=7216403190102&pd_rd_plhdr=t&pd_rd_r=e00ebe0c-0994-4f1a-b935-9475684763aa&pd_rd_w=WgPjO&pd_rd_wg=siodQ&ref_=sbx_be_s_sparkle_mcd_asin_0_title