Leedy, P. D. (1985). Practical research: Planning and design (3rd ed.). Macmillan.
芝加哥风格引文Leedy, Paul D. Practical Research: Planning and Design. 3rd ed. New York: Macmillan, 1985.
MLA引文Leedy, Paul D. Practical Research: Planning and Design. 3rd ed. Macmillan, 1985.
警告：这些引文格式不一定是100％准确.