Leedy, P. D., & Ormrod, J. E. (2005). Practical research: Planning and design (8th ed.). Prentice Hall.
芝加哥风格引文Leedy, Paul D., 与 Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Upper Saddle River, N.J.: Prentice Hall, 2005.
MLA引文Leedy, Paul D., 与 Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Prentice Hall, 2005.
警告：这些引文格式不一定是100％准确.