POL'P21 UG/22517 UG/22518 UG/22519 Polit, Denise F. Essentials of nursing research / Denise F. Polit, Cheryl Tatano Beck. – 9th ed. – New Delhi : Wolters Kluwer, c2018 2021 (reprint) xvi,442p. ISBN9789351298335 : Rs.850/- . Nursing research . Polit, Denise F. . Beck, Cheryl Tatano |