Leedy, P. D., & Ormrod, J. E. (2001). Practical research (7th edition.). Upper Saddle River, N.J.: Merrill Prentice Hall.
Trích dẫn kiểu ChicagoLeedy, Paul D., và Jeanne Ellis Ormrod. Practical Research. 7th edition. Upper Saddle River, N.J.: Merrill Prentice Hall, 2001.
ציטוט MLALeedy, Paul D., và Jeanne Ellis Ormrod. Practical Research. 7th edition. Upper Saddle River, N.J.: Merrill Prentice Hall, 2001.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.