APA
Polit D. F., Beck C. T., . (2008). Nursing research. Philadelphia: Wolters Kluwer Health/lippincott Williams & Wilkins.
Chicago
Polit Denise F, Beck Cheryl Tatano, . 2008. Nursing research. Philadelphia: Wolters Kluwer Health/lippincott Williams & Wilkins.
Harvard
Polit D. F., Beck C. T., . (2008). Nursing research. Philadelphia: Wolters Kluwer Health/lippincott Williams & Wilkins.
MLA
Polit Denise F, Beck Cheryl Tatano, . Nursing research. Philadelphia: Wolters Kluwer Health/lippincott Williams & Wilkins. 2008.