Cita APA

Polit, D. F., & Beck, C. T. (2004). Nursing research: Principles and methods (7. edition.). Philadelphia: Lippincott Williams & Wilkins.

Citación estilo Chicago

Polit, Denise F., y Cheryl Tatano Beck. Nursing Research: Principles and Methods. 7. edition. Philadelphia: Lippincott Williams & Wilkins, 2004.

Cita MLA

Polit, Denise F., y Cheryl Tatano Beck. Nursing Research: Principles and Methods. 7. edition. Philadelphia: Lippincott Williams & Wilkins, 2004.