Cita APA

Polit, D. F., & Hungler, B. P. (1998). Nursing research: Principles and methods (6. edition.). Philadelphia: Lippincott.

Citación estilo Chicago

Polit, Denise F., y Bernadette P. Hungler. Nursing Research: Principles and Methods. 6. edition. Philadelphia: Lippincott, 1998.

Cita MLA

Polit, Denise F., y Bernadette P. Hungler. Nursing Research: Principles and Methods. 6. edition. Philadelphia: Lippincott, 1998.