Leedy, P. D., & Ormrod, J. E. (2005). Practical research: Planning and design (8th ed.). Upper Saddle River, N.J.: Prentice Hall.
استشهاد بنمط شيكاغوLeedy, Paul D., و Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Upper Saddle River, N.J.: Prentice Hall, 2005.
MLA استشهادLeedy, Paul D., و Jeanne Ellis Ormrod. Practical Research: Planning and Design. 8th ed. Upper Saddle River, N.J.: Prentice Hall, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.