Polit, D. F. (1991). Nursing research: Principles and methods (4th ed.). Lippincott.
芝加哥风格引文Polit, Denise F. Nursing Research: Principles and Methods. 4th ed. Philadelphia: Lippincott, 1991.
MLA引文Polit, Denise F. Nursing Research: Principles and Methods. 4th ed. Lippincott, 1991.
警告：这些引文格式不一定是100％准确.