Polit, D., & Beck, C. T. (2004). Essentials of Nursing Research: Methods, Appraisal, and Utilization. Lippicott Williams & Willkins.
Lua i Stíl Chicago (17ú heag.)Polit, Dennise, agus Cheryl Tatano Beck. Essentials of Nursing Research: Methods, Appraisal, and Utilization. Lippicott Williams & Willkins, 2004.
Lua MLA (9ú heag.)Polit, Dennise, agus Cheryl Tatano Beck. Essentials of Nursing Research: Methods, Appraisal, and Utilization. Lippicott Williams & Willkins, 2004.
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