Gaya APA

Polit, D, F., Beck, C, T. (2000). Nursing Research: Principles and Methods (7). US Amerika: Lippincott Williams & Wilkins.

Gaya MLA

Polit, Denise, F.., Beck, Cheryl, Tatano. "Nursing Research: Principles and Methods". 7 US Amerika: Lippincott Williams & Wilkins, 2000. Electronic Resource.