Gaya APA

Polit, D, F., Beck, H, T. (2010). Essentials of Nursing Research : Appraising Evidence for Nursing Practice (Seventh Edition). Philadephia: Wolters Kluwer.

Gaya MLA

Polit, Denise, F.., Beck, Hery, Tatano. "Essentials of Nursing Research : Appraising Evidence for Nursing Practice". Seventh Edition Philadephia: Wolters Kluwer, 2010. Text.